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+<!doctype html>
+
+<html lang="es">
+<head>
+  <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+      <title>LinTO STT — Cliente Web (micrófono → WS → subtítulos)</title>
+        <style>
+            :root { color-scheme: light dark; }
+                body { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; margin: 16px; }
+                    .row { display:flex; gap: 12px; flex-wrap: wrap; align-items: center; }
+                        input, select, button { font-size: 16px; padding: 10px 12px; border-radius: 10px; border: 1px solid #6664; }
+                            button { cursor: pointer; }
+                                button:disabled { opacity: .6; cursor: not-allowed; }
+                                    .card { border: 1px solid #6664; border-radius: 16px; padding: 14px; margin-top: 12px; }
+                                        .subtitle { font-size: 28px; line-height: 1.25; min-height: 2.5em; }
+                                            .muted { opacity: .75; }
+                                                pre { white-space: pre-wrap; word-wrap: break-word; }
+                                                    .pill { display:inline-block; padding: 4px 10px; border-radius: 999px; border:1px solid #6664; font-size: 12px; }
+                                                      </style>
+                                                      </head>
+                                                      <body>
+                                                        <h1>LinTO STT — Cliente Web</h1>
+                                                          <p class="muted">Captura micrófono → re-muestrea a 16 kHz mono PCM 16-bit → envía por WebSocket → muestra subtítulos (parcial/final).</p>  <div class="card">
+                                                              <div class="row">
+                                                                    <label>
+                                                                            WebSocket URL
+                                                                                    <input id="wsUrl" size="36" value="wss://livesst.thax.es/" />
+                                                                                          </label>
+                                                                                                <label>
+                                                                                                        Idioma (opcional)
+                                                                                                                <select id="lang">
+                                                                                                                          <option value="">auto</option>
+                                                                                                                                    <option value="es">es</option>
+                                                                                                                                              <option value="en">en</option>
+                                                                                                                                                        <option value="it">it</option>
+                                                                                                                                                                  <option value="fr">fr</option>
+                                                                                                                                                                            <option value="de">de</option>
+                                                                                                                                                                                    </select>
+                                                                                                                                                                                          </label>
+                                                                                                                                                                                                <label>
+                                                                                                                                                                                                        Chunk (ms)
+                                                                                                                                                                                                                <select id="chunkMs">
+                                                                                                                                                                                                                          <option value="250">250</option>
+                                                                                                                                                                                                                                    <option value="500" selected>500</option>
+                                                                                                                                                                                                                                              <option value="1000">1000</option>
+                                                                                                                                                                                                                                                      </select>
+                                                                                                                                                                                                                                                            </label>
+                                                                                                                                                                                                                                                                </div><div class="row" style="margin-top:10px;">
+                                                                                                                                                                                                                                                                  <button id="btnStart">🎙️ Iniciar</button>
+                                                                                                                                                                                                                                                                    <button id="btnStop" disabled>⏹️ Parar</button>
+                                                                                                                                                                                                                                                                      <span id="status" class="pill">Desconectado</span>
+                                                                                                                                                                                                                                                                        <span class="muted">Tip: si tu servidor WS usa ruta <code>/ws</code>, ponla en la URL.</span>
+                                                                                                                                                                                                                                                                        </div>
+
+                                                                                                                                                                                                                                                                          </div>  <div class="card">
+                                                                                                                                                                                                                                                                              <div class="subtitle" id="live">(subtítulo en vivo)</div>
+                                                                                                                                                                                                                                                                                  <div class="muted" id="final" style="margin-top:10px;"></div>
+                                                                                                                                                                                                                                                                                    </div>  <div class="card">
+                                                                                                                                                                                                                                                                                        <details>
+                                                                                                                                                                                                                                                                                              <summary>Logs</summary>
+                                                                                                                                                                                                                                                                                                    <pre id="log"></pre>
+                                                                                                                                                                                                                                                                                                        </details>
+                                                                                                                                                                                                                                                                                                          </div><script>
+                                                                                                                                                                                                                                                                                                            // ---- Utilidades UI ----
+                                                                                                                                                                                                                                                                                                              const $ = (id) => document.getElementById(id);
+                                                                                                                                                                                                                                                                                                                const logEl = $('log');
+                                                                                                                                                                                                                                                                                                                  const statusEl = $('status');
+                                                                                                                                                                                                                                                                                                                    const liveEl = $('live');
+                                                                                                                                                                                                                                                                                                                      const finalEl = $('final');
+
+                                                                                                                                                                                                                                                                                                                        function log(msg) {
+                                                                                                                                                                                                                                                                                                                            const ts = new Date().toISOString().slice(11, 19);
+                                                                                                                                                                                                                                                                                                                                logEl.textContent += `[${ts}] ${msg}\n`;
+                                                                                                                                                                                                                                                                                                                                    logEl.scrollTop = logEl.scrollHeight;
+                                                                                                                                                                                                                                                                                                                                      }
+
+                                                                                                                                                                                                                                                                                                                                        function setStatus(text) {
+                                                                                                                                                                                                                                                                                                                                            statusEl.textContent = text;
+                                                                                                                                                                                                                                                                                                                                              }
+
+                                                                                                                                                                                                                                                                                                                                                // ---- Audio helpers ----
+                                                                                                                                                                                                                                                                                                                                                  // Convierte Float32 [-1..1] a PCM16 little-endian.
+                                                                                                                                                                                                                                                                                                                                                    function floatTo16BitPCM(float32Array) {
+                                                                                                                                                                                                                                                                                                                                                        const buffer = new ArrayBuffer(float32Array.length * 2);
+                                                                                                                                                                                                                                                                                                                                                            const view = new DataView(buffer);
+                                                                                                                                                                                                                                                                                                                                                                for (let i = 0; i < float32Array.length; i++) {
+                                                                                                                                                                                                                                                                                                                                                                      let s = Math.max(-1, Math.min(1, float32Array[i]));
+                                                                                                                                                                                                                                                                                                                                                                            view.setInt16(i * 2, s < 0 ? s * 0x8000 : s * 0x7fff, true);
+                                                                                                                                                                                                                                                                                                                                                                                }
+                                                                                                                                                                                                                                                                                                                                                                                    return buffer;
+                                                                                                                                                                                                                                                                                                                                                                                      }
+
+                                                                                                                                                                                                                                                                                                                                                                                        // Re-muestreo simple (linear interpolation) de sampleRateIn -> 16000.
+                                                                                                                                                                                                                                                                                                                                                                                          function resampleTo16k(input, sampleRateIn) {
+                                                                                                                                                                                                                                                                                                                                                                                              const sampleRateOut = 16000;
+                                                                                                                                                                                                                                                                                                                                                                                                  if (sampleRateIn === sampleRateOut) return input;
+
+                                                                                                                                                                                                                                                                                                                                                                                                      const ratio = sampleRateIn / sampleRateOut;
+                                                                                                                                                                                                                                                                                                                                                                                                          const outLength = Math.round(input.length / ratio);
+                                                                                                                                                                                                                                                                                                                                                                                                              const output = new Float32Array(outLength);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                  for (let i = 0; i < outLength; i++) {
+                                                                                                                                                                                                                                                                                                                                                                                                                        const pos = i * ratio;
+                                                                                                                                                                                                                                                                                                                                                                                                                              const left = Math.floor(pos);
+                                                                                                                                                                                                                                                                                                                                                                                                                                    const right = Math.min(left + 1, input.length - 1);
+                                                                                                                                                                                                                                                                                                                                                                                                                                          const frac = pos - left;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                output[i] = input[left] * (1 - frac) + input[right] * frac;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                    }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                        return output;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                          }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                            // ---- Estado global ----
+                                                                                                                                                                                                                                                                                                                                                                                                                                                              let ws = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                let audioCtx = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                  let mediaStream = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                    let processor = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                      let chunkBuffer = []; // Float32 chunks
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                        let chunkSamplesTarget = 0;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                          let inputSampleRate = 48000;
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                            function resetAudioState() {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                chunkBuffer = [];
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    chunkSamplesTarget = 0;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        inputSampleRate = 48000;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            function closeAll() {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                try { if (processor) processor.disconnect(); } catch {}
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    try { if (audioCtx) audioCtx.close(); } catch {}
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        try { if (mediaStream) mediaStream.getTracks().forEach(t => t.stop()); } catch {}
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            try { if (ws) ws.close(); } catch {}
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                processor = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    audioCtx = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        mediaStream = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            ws = null;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                resetAudioState();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    // ---- WS manejo ----
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      function buildWsUrl(baseUrl, lang) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          // Si tu backend acepta query params, los añadimos.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              // Si no, no pasa nada: el servidor los ignorará.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  const url = new URL(baseUrl);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      if (lang) url.searchParams.set('language', lang);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          return url.toString();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              function connectWs() {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  const baseUrl = $('wsUrl').value.trim();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      const lang = $('lang').value;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          const wsUrl = buildWsUrl(baseUrl, lang);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              log(`Conectando WS: ${wsUrl}`);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  ws = new WebSocket(wsUrl);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      ws.binaryType = 'arraybuffer';
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          ws.onopen = () => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                setStatus('Conectado');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log('WS abierto');
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            // LinTO (streaming) suele requerir un mensaje de configuración ANTES de enviar audio.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  // Si no se envía, el servidor puede cerrar con: "Failed to load configuration".
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        const lang = $('lang').value;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              const cfg = {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      config: {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                sample_rate: 16000,
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          // Si el backend ignora language, no pasa nada.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    ...(lang ? { language: lang } : {})
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  };
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        try {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ws.send(JSON.stringify(cfg));
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        log('Config enviada (sample_rate=16000)');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              } catch (e) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log('No se pudo enviar config: ' + (e?.message || e));
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                };
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    ws.onerror = (e) => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          log('WS error (mira consola también)');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                console.error(e);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    };
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        ws.onclose = (e) => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              setStatus('Desconectado');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    log(`WS cerrado: code=${e.code} reason=${e.reason || '(sin reason)'}`);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          // Si cerró inesperadamente y seguimos "en marcha", apagamos audio.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                if (!$('btnStart').disabled) return; // ya estamos parados
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      $('btnStop').disabled = true;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('btnStart').disabled = false;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  closeAll();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      };
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          ws.onmessage = (evt) => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                // La mayoría de servidores devuelven JSON.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      try {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              const msg = JSON.parse(evt.data);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      // Campos comunes: text, is_final/final, partial, etc.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              const text = msg.text ?? msg.partial ?? msg.transcript ?? '';
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      const isFinal = msg.is_final ?? msg.final ?? false;
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              if (text) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        liveEl.textContent = text;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  if (isFinal) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              finalEl.textContent += (finalEl.textContent ? ' ' : '') + text;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      } catch {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              // Si no es JSON, lo mostramos bruto.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log(`Mensaje: ${String(evt.data).slice(0, 200)}`);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                };
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    // ---- Captura micrófono y envío ----
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      async function start() {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          finalEl.textContent = '';
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              liveEl.textContent = '(escuchando...)';
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  // 1) Pide micrófono primero (en móvil es crucial; si falla WS, al menos sabrás que el permiso funciona)
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      mediaStream = await navigator.mediaDevices.getUserMedia({ audio: true, video: false });
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          // 2) Luego abre el WebSocket
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              connectWs();
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  // Espera a que WS abra (con timeout)
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      await new Promise((resolve, reject) => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            const t0 = Date.now();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  const timer = setInterval(() => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          if (ws && ws.readyState === WebSocket.OPEN) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    clearInterval(timer);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              resolve();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              if (Date.now() - t0 > 8000) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        clearInterval(timer);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  reject(new Error('Timeout esperando WS OPEN'));
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                }, 50);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    }).catch(err => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          log(err.message);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                closeAll();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      throw err;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          });
+
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  inputSampleRate = audioCtx.sampleRate;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log(`AudioContext sampleRate=${inputSampleRate}`);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          const source = audioCtx.createMediaStreamSource(mediaStream);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              // ScriptProcessor es legacy pero funciona en móvil sin complicaciones.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  // bufferSize: 4096 suele ir bien.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      processor = audioCtx.createScriptProcessor(4096, 1, 1);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          const chunkMs = parseInt($('chunkMs').value, 10);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              // samples target en sampleRate de entrada
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  chunkSamplesTarget = Math.round((inputSampleRate * chunkMs) / 1000);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log(`Chunk target ~${chunkMs}ms => ${chunkSamplesTarget} samples @ ${inputSampleRate}Hz`);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          processor.onaudioprocess = (e) => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                if (!ws || ws.readyState !== WebSocket.OPEN) return;
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      const input = e.inputBuffer.getChannelData(0);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            // copiamos porque el buffer se reutiliza
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  chunkBuffer.push(new Float32Array(input));
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        // Unimos hasta tener chunkSamplesTarget
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              let total = chunkBuffer.reduce((acc, a) => acc + a.length, 0);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    if (total < chunkSamplesTarget) return;
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          // concat
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                const merged = new Float32Array(total);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      let offset = 0;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            for (const arr of chunkBuffer) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    merged.set(arr, offset);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            offset += arr.length;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        chunkBuffer = [];
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              // resample -> 16k
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    const resampled = resampleTo16k(merged, inputSampleRate);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          const pcm16 = floatTo16BitPCM(resampled);
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                try {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        ws.send(pcm16);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              } catch (err) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      log(`Error enviando audio: ${err.message}`);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                };
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    source.connect(processor);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        processor.connect(audioCtx.destination); // necesario en algunos navegadores
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            $('btnStart').disabled = true;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('btnStop').disabled = false;
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    log('🎙️ Captura iniciada');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        function stop() {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            log('⏹️ Parando...');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('btnStop').disabled = true;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('btnStart').disabled = false;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        closeAll();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            liveEl.textContent = '(parado)';
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                setStatus('Desconectado');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  }
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    // ---- UI ----
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      $('btnStart').addEventListener('click', async () => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          try {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                await start();
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    } catch (err) {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          alert(`No se pudo iniciar: ${err.message}`);
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                $('btnStop').disabled = true;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      $('btnStart').disabled = false;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            setStatus('Desconectado');
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                }
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  });
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    $('btnStop').addEventListener('click', () => stop());
+
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      // Buenas prácticas: cerrar al salir.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        window.addEventListener('beforeunload', () => {
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            try { closeAll(); } catch {}
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              });
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              </script></body>
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              </html>
\ No newline at end of file
