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| 1 | 
            +
            <!DOCTYPE html>
         | 
| 2 | 
            +
            <html lang="en">
         | 
| 3 | 
            +
            <head>
         | 
| 4 | 
            +
                <meta charset="UTF-8">
         | 
| 5 | 
            +
                <meta name="viewport" content="width=device-width, initial-scale=1.0">
         | 
| 6 | 
            +
                <title>Voice Chat Bot with Advanced Echo Cancellation</title>
         | 
| 7 | 
            +
                <script src="https://cdn.jsdelivr.net/npm/onnxruntime-web/dist/ort.js"></script>
         | 
| 8 | 
            +
                <script src="https://cdn.jsdelivr.net/npm/@ricky0123/[email protected]/dist/bundle.min.js"></script>
         | 
| 9 | 
            +
                <script src="https://cdn.jsdelivr.net/npm/@xenova/[email protected]"></script>
         | 
| 10 | 
            +
                <style>
         | 
| 11 | 
            +
                    body {
         | 
| 12 | 
            +
                        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
         | 
| 13 | 
            +
                        margin: 0;
         | 
| 14 | 
            +
                        padding: 20px;
         | 
| 15 | 
            +
                        background-color: #1a1a1a;
         | 
| 16 | 
            +
                        color: #f0f0f0;
         | 
| 17 | 
            +
                    }
         | 
| 18 | 
            +
                    .container {
         | 
| 19 | 
            +
                        max-width: 800px;
         | 
| 20 | 
            +
                        margin: 0 auto;
         | 
| 21 | 
            +
                    }
         | 
| 22 | 
            +
                    h1 {
         | 
| 23 | 
            +
                        color: #ffd700;
         | 
| 24 | 
            +
                        text-align: center;
         | 
| 25 | 
            +
                        margin-bottom: 10px;
         | 
| 26 | 
            +
                    }
         | 
| 27 | 
            +
                    .subtitle {
         | 
| 28 | 
            +
                        text-align: center;
         | 
| 29 | 
            +
                        color: #ffd700;
         | 
| 30 | 
            +
                        margin-bottom: 20px;
         | 
| 31 | 
            +
                    }
         | 
| 32 | 
            +
                    #chat-container {
         | 
| 33 | 
            +
                        display: flex;
         | 
| 34 | 
            +
                        flex-direction: column;
         | 
| 35 | 
            +
                        height: 70vh;
         | 
| 36 | 
            +
                    }
         | 
| 37 | 
            +
                    #conversation {
         | 
| 38 | 
            +
                        flex-grow: 1;
         | 
| 39 | 
            +
                        border: 1px solid #444;
         | 
| 40 | 
            +
                        padding: 10px;
         | 
| 41 | 
            +
                        overflow-y: scroll;
         | 
| 42 | 
            +
                        background-color: #2a2a2a;
         | 
| 43 | 
            +
                        border-radius: 5px;
         | 
| 44 | 
            +
                        margin-bottom: 20px;
         | 
| 45 | 
            +
                    }
         | 
| 46 | 
            +
                    #controls {
         | 
| 47 | 
            +
                        display: flex;
         | 
| 48 | 
            +
                        justify-content: center;
         | 
| 49 | 
            +
                        margin-bottom: 20px;
         | 
| 50 | 
            +
                    }
         | 
| 51 | 
            +
                    button {
         | 
| 52 | 
            +
                        font-size: 18px;
         | 
| 53 | 
            +
                        padding: 10px 20px;
         | 
| 54 | 
            +
                        background-color: #ffd700;
         | 
| 55 | 
            +
                        color: #1a1a1a;
         | 
| 56 | 
            +
                        border: none;
         | 
| 57 | 
            +
                        border-radius: 5px;
         | 
| 58 | 
            +
                        cursor: pointer;
         | 
| 59 | 
            +
                        transition: background-color 0.3s;
         | 
| 60 | 
            +
                    }
         | 
| 61 | 
            +
                    button:hover {
         | 
| 62 | 
            +
                        background-color: #ffec8b;
         | 
| 63 | 
            +
                    }
         | 
| 64 | 
            +
                    button:disabled {
         | 
| 65 | 
            +
                        background-color: #666;
         | 
| 66 | 
            +
                        cursor: not-allowed;
         | 
| 67 | 
            +
                    }
         | 
| 68 | 
            +
                    #visualizer {
         | 
| 69 | 
            +
                        width: 100%;
         | 
| 70 | 
            +
                        height: 100px;
         | 
| 71 | 
            +
                        background-color: #2a2a2a;
         | 
| 72 | 
            +
                        border-radius: 5px;
         | 
| 73 | 
            +
                        overflow: hidden;
         | 
| 74 | 
            +
                        margin-bottom: 20px;
         | 
| 75 | 
            +
                    }
         | 
| 76 | 
            +
                    .bar {
         | 
| 77 | 
            +
                        width: 5px;
         | 
| 78 | 
            +
                        height: 100%;
         | 
| 79 | 
            +
                        background-color: #ffd700;
         | 
| 80 | 
            +
                        display: inline-block;
         | 
| 81 | 
            +
                        margin-right: 1px;
         | 
| 82 | 
            +
                    }
         | 
| 83 | 
            +
                    #loading {
         | 
| 84 | 
            +
                        position: fixed;
         | 
| 85 | 
            +
                        top: 0;
         | 
| 86 | 
            +
                        left: 0;
         | 
| 87 | 
            +
                        width: 100%;
         | 
| 88 | 
            +
                        height: 100%;
         | 
| 89 | 
            +
                        background-color: rgba(0, 0, 0, 0.8);
         | 
| 90 | 
            +
                        display: flex;
         | 
| 91 | 
            +
                        justify-content: center;
         | 
| 92 | 
            +
                        align-items: center;
         | 
| 93 | 
            +
                        z-index: 1000;
         | 
| 94 | 
            +
                    }
         | 
| 95 | 
            +
                    .spinner {
         | 
| 96 | 
            +
                        width: 50px;
         | 
| 97 | 
            +
                        height: 50px;
         | 
| 98 | 
            +
                        border: 5px solid #f3f3f3;
         | 
| 99 | 
            +
                        border-top: 5px solid #ffd700;
         | 
| 100 | 
            +
                        border-radius: 50%;
         | 
| 101 | 
            +
                        animation: spin 1s linear infinite;
         | 
| 102 | 
            +
                    }
         | 
| 103 | 
            +
                    @keyframes spin {
         | 
| 104 | 
            +
                        0% { transform: rotate(0deg); }
         | 
| 105 | 
            +
                        100% { transform: rotate(360deg); }
         | 
| 106 | 
            +
                    }
         | 
| 107 | 
            +
                    #configuration {
         | 
| 108 | 
            +
                        margin-bottom: 20px;
         | 
| 109 | 
            +
                    }
         | 
| 110 | 
            +
                    select {
         | 
| 111 | 
            +
                        width: 100%;
         | 
| 112 | 
            +
                        padding: 10px;
         | 
| 113 | 
            +
                        font-size: 16px;
         | 
| 114 | 
            +
                        background-color: #2a2a2a;
         | 
| 115 | 
            +
                        color: #f0f0f0;
         | 
| 116 | 
            +
                        border: 1px solid #444;
         | 
| 117 | 
            +
                        border-radius: 5px;
         | 
| 118 | 
            +
                    }
         | 
| 119 | 
            +
                    #model-info {
         | 
| 120 | 
            +
                        margin-top: 10px;
         | 
| 121 | 
            +
                        font-size: 14px;
         | 
| 122 | 
            +
                        color: #aaa;
         | 
| 123 | 
            +
                    }
         | 
| 124 | 
            +
                    #logs {
         | 
| 125 | 
            +
                        background-color: #2a2a2a;
         | 
| 126 | 
            +
                        border: 1px solid #444;
         | 
| 127 | 
            +
                        border-radius: 5px;
         | 
| 128 | 
            +
                        padding: 10px;
         | 
| 129 | 
            +
                        height: 200px;
         | 
| 130 | 
            +
                        overflow-y: scroll;
         | 
| 131 | 
            +
                        font-family: monospace;
         | 
| 132 | 
            +
                        font-size: 14px;
         | 
| 133 | 
            +
                    }
         | 
| 134 | 
            +
                    #clear-logs {
         | 
| 135 | 
            +
                        margin-top: 10px;
         | 
| 136 | 
            +
                        font-size: 14px;
         | 
| 137 | 
            +
                        padding: 5px 10px;
         | 
| 138 | 
            +
                    }
         | 
| 139 | 
            +
                    #localVideo, #remoteVideo {
         | 
| 140 | 
            +
                        display: none;
         | 
| 141 | 
            +
                    }
         | 
| 142 | 
            +
                </style>
         | 
| 143 | 
            +
            </head>
         | 
| 144 | 
            +
            <body>
         | 
| 145 | 
            +
                <div id="loading">
         | 
| 146 | 
            +
                    <div class="spinner"></div>
         | 
| 147 | 
            +
                </div>
         | 
| 148 | 
            +
                <div class="container">
         | 
| 149 | 
            +
                    <h1>Voice Chat Bot Demo</h1>
         | 
| 150 | 
            +
                    <p class="subtitle">For best results, use headphones.</p>
         | 
| 151 | 
            +
                    <div id="chat-container">
         | 
| 152 | 
            +
                        <div id="controls">
         | 
| 153 | 
            +
                            <button id="startButton" disabled>Begin Call</button>
         | 
| 154 | 
            +
                        </div>
         | 
| 155 | 
            +
                        <div id="configuration">
         | 
| 156 | 
            +
                            <select id="configSelect">
         | 
| 157 | 
            +
                                <option value="fastest">Fastest</option>
         | 
| 158 | 
            +
                                <option value="balanced">Balanced</option>
         | 
| 159 | 
            +
                                <option value="quality">Highest Quality</option>
         | 
| 160 | 
            +
                            </select>
         | 
| 161 | 
            +
                            <div id="model-info">
         | 
| 162 | 
            +
                                TTS: Xenova/mms-tts-eng / STT: Xenova/whisper-tiny.en / LLM: Placeholder
         | 
| 163 | 
            +
                            </div>
         | 
| 164 | 
            +
                        </div>
         | 
| 165 | 
            +
                        <div id="visualizer"></div>
         | 
| 166 | 
            +
                        <div id="conversation"></div>
         | 
| 167 | 
            +
                    </div>
         | 
| 168 | 
            +
                    <h2>Logs</h2>
         | 
| 169 | 
            +
                    <div id="logs"></div>
         | 
| 170 | 
            +
                    <button id="clear-logs">Clear</button>
         | 
| 171 | 
            +
                </div>
         | 
| 172 | 
            +
                <video id="localVideo" autoplay></video>
         | 
| 173 | 
            +
                <video id="remoteVideo" autoplay></video>
         | 
| 174 | 
            +
             | 
| 175 | 
            +
                <script type="module">
         | 
| 176 | 
            +
                    import { pipeline, env } from 'https://cdn.jsdelivr.net/npm/@xenova/[email protected]';
         | 
| 177 | 
            +
             | 
| 178 | 
            +
                    env.localModelPath = './models';
         | 
| 179 | 
            +
             | 
| 180 | 
            +
                    const conversationDiv = document.getElementById('conversation');
         | 
| 181 | 
            +
                    const startButton = document.getElementById('startButton');
         | 
| 182 | 
            +
                    const visualizer = document.getElementById('visualizer');
         | 
| 183 | 
            +
                    const loadingDiv = document.getElementById('loading');
         | 
| 184 | 
            +
                    const logsDiv = document.getElementById('logs');
         | 
| 185 | 
            +
                    const clearLogsButton = document.getElementById('clear-logs');
         | 
| 186 | 
            +
                    const localVideo = document.getElementById('localVideo');
         | 
| 187 | 
            +
                    const remoteVideo = document.getElementById('remoteVideo');
         | 
| 188 | 
            +
             | 
| 189 | 
            +
                    let myvad;
         | 
| 190 | 
            +
                    let sttPipeline;
         | 
| 191 | 
            +
                    let ttsPipeline;
         | 
| 192 | 
            +
                    let audioContext;
         | 
| 193 | 
            +
                    let analyser;
         | 
| 194 | 
            +
                    let dataArray;
         | 
| 195 | 
            +
                    let bars;
         | 
| 196 | 
            +
                    let animationId;
         | 
| 197 | 
            +
                    let isListening = false;
         | 
| 198 | 
            +
                    let microphoneStream;
         | 
| 199 | 
            +
                    let isSpeaking = false;
         | 
| 200 | 
            +
                    let currentAudioSource = null;
         | 
| 201 | 
            +
                    let rtcConnection = null;
         | 
| 202 | 
            +
                    let rtcLoopbackConnection = null;
         | 
| 203 | 
            +
                    let loopbackStream = new MediaStream();
         | 
| 204 | 
            +
             | 
| 205 | 
            +
                    function createVisualizer() {
         | 
| 206 | 
            +
                        const barCount = 64;
         | 
| 207 | 
            +
                        for (let i = 0; i < barCount; i++) {
         | 
| 208 | 
            +
                            const bar = document.createElement('div');
         | 
| 209 | 
            +
                            bar.className = 'bar';
         | 
| 210 | 
            +
                            visualizer.appendChild(bar);
         | 
| 211 | 
            +
                        }
         | 
| 212 | 
            +
                        bars = visualizer.getElementsByClassName('bar');
         | 
| 213 | 
            +
                    }
         | 
| 214 | 
            +
             | 
| 215 | 
            +
                    function updateVisualizer() {
         | 
| 216 | 
            +
                        analyser.getByteFrequencyData(dataArray);
         | 
| 217 | 
            +
                        for (let i = 0; i < bars.length; i++) {
         | 
| 218 | 
            +
                            const barHeight = dataArray[i] / 2;
         | 
| 219 | 
            +
                            bars[i].style.height = barHeight + 'px';
         | 
| 220 | 
            +
                        }
         | 
| 221 | 
            +
                        animationId = requestAnimationFrame(updateVisualizer);
         | 
| 222 | 
            +
                    }
         | 
| 223 | 
            +
             | 
| 224 | 
            +
                    async function initializePipelines() {
         | 
| 225 | 
            +
                        try {
         | 
| 226 | 
            +
                            sttPipeline = await pipeline('automatic-speech-recognition', 'Xenova/whisper-tiny.en');
         | 
| 227 | 
            +
                            ttsPipeline = await pipeline('text-to-speech', 'Xenova/mms-tts-eng', {
         | 
| 228 | 
            +
                                quantized: false,
         | 
| 229 | 
            +
                            });
         | 
| 230 | 
            +
                            addLog('System: Voice Chat Bot initialized. Click "Begin Call" to start.');
         | 
| 231 | 
            +
                            startButton.disabled = false;
         | 
| 232 | 
            +
                            loadingDiv.style.display = 'none';
         | 
| 233 | 
            +
                        } catch (error) {
         | 
| 234 | 
            +
                            console.error('Error initializing pipelines:', error);
         | 
| 235 | 
            +
                            addLog('System: Error initializing Voice Chat Bot. Please check the console for details.');
         | 
| 236 | 
            +
                            loadingDiv.style.display = 'none';
         | 
| 237 | 
            +
                        }
         | 
| 238 | 
            +
                    }
         | 
| 239 | 
            +
             | 
| 240 | 
            +
                    async function processSpeech(audio) {
         | 
| 241 | 
            +
                        try {
         | 
| 242 | 
            +
                            if (!sttPipeline || !ttsPipeline) {
         | 
| 243 | 
            +
                                throw new Error('Pipelines not initialized');
         | 
| 244 | 
            +
                            }
         | 
| 245 | 
            +
             | 
| 246 | 
            +
                            const transcription = await sttPipeline(audio);
         | 
| 247 | 
            +
                            addLog(User: ${transcription.text});
         | 
| 248 | 
            +
                            
         | 
| 249 | 
            +
                            const botResponse = I heard you say: "${transcription.text}".;
         | 
| 250 | 
            +
                            addLog(Bot: ${botResponse});
         | 
| 251 | 
            +
             | 
| 252 | 
            +
                            isSpeaking = true;
         | 
| 253 | 
            +
                            const speechOutput = await ttsPipeline(botResponse);
         | 
| 254 | 
            +
                            await playAudio(speechOutput.audio);
         | 
| 255 | 
            +
                            isSpeaking = false;
         | 
| 256 | 
            +
                        } catch (error) {
         | 
| 257 | 
            +
                            console.error('Error processing speech:', error);
         | 
| 258 | 
            +
                            addLog('System: Error processing speech. Please try again.');
         | 
| 259 | 
            +
                        }
         | 
| 260 | 
            +
                    }
         | 
| 261 | 
            +
             | 
| 262 | 
            +
                    function addLog(message) {
         | 
| 263 | 
            +
                        const now = new Date();
         | 
| 264 | 
            +
                        const timestamp = now.toLocaleTimeString();
         | 
| 265 | 
            +
                        const logMessage = [${timestamp}] ${message};
         | 
| 266 | 
            +
                        const messageElement = document.createElement('div');
         | 
| 267 | 
            +
                        messageElement.textContent = logMessage;
         | 
| 268 | 
            +
                        logsDiv.appendChild(messageElement);
         | 
| 269 | 
            +
                        logsDiv.scrollTop = logsDiv.scrollHeight;
         | 
| 270 | 
            +
                    }
         | 
| 271 | 
            +
             | 
| 272 | 
            +
                    function playAudio(audioArray) {
         | 
| 273 | 
            +
                        return new Promise((resolve) => {
         | 
| 274 | 
            +
                            const audioBuffer = audioContext.createBuffer(1, audioArray.length, 16000);
         | 
| 275 | 
            +
                            const channelData = audioBuffer.getChannelData(0);
         | 
| 276 | 
            +
                            channelData.set(audioArray);
         | 
| 277 | 
            +
             | 
| 278 | 
            +
                            const source = audioContext.createBufferSource();
         | 
| 279 | 
            +
                            currentAudioSource = source;
         | 
| 280 | 
            +
                            source.buffer = audioBuffer;
         | 
| 281 | 
            +
                            source.connect(analyser);
         | 
| 282 | 
            +
                            analyser.connect(audioContext.destination);
         | 
| 283 | 
            +
                            source.start();
         | 
| 284 | 
            +
                            source.onended = () => {
         | 
| 285 | 
            +
                                currentAudioSource = null;
         | 
| 286 | 
            +
                                resolve();
         | 
| 287 | 
            +
                            };
         | 
| 288 | 
            +
                        });
         | 
| 289 | 
            +
                    }
         | 
| 290 | 
            +
             | 
| 291 | 
            +
                    function stopCurrentAudio() {
         | 
| 292 | 
            +
                        if (currentAudioSource) {
         | 
| 293 | 
            +
                            currentAudioSource.stop();
         | 
| 294 | 
            +
                            currentAudioSource = null;
         | 
| 295 | 
            +
                        }
         | 
| 296 | 
            +
                    }
         | 
| 297 | 
            +
             | 
| 298 | 
            +
                    async function toggleListening() {
         | 
| 299 | 
            +
                        if (isListening) {
         | 
| 300 | 
            +
                            await stopListening();
         | 
| 301 | 
            +
                        } else {
         | 
| 302 | 
            +
                            await startListening();
         | 
| 303 | 
            +
                        }
         | 
| 304 | 
            +
                    }
         | 
| 305 | 
            +
             | 
| 306 | 
            +
                    async function startListening() {
         | 
| 307 | 
            +
                        try {
         | 
| 308 | 
            +
                            audioContext = new (window.AudioContext || window.webkitAudioContext)();
         | 
| 309 | 
            +
                            analyser = audioContext.createAnalyser();
         | 
| 310 | 
            +
                            analyser.fftSize = 128;
         | 
| 311 | 
            +
                            dataArray = new Uint8Array(analyser.frequencyBinCount);
         | 
| 312 | 
            +
             | 
| 313 | 
            +
                            localVideo.volume = 0;
         | 
| 314 | 
            +
                            localVideo.muted = true;
         | 
| 315 | 
            +
                            document.getElementById('localVideo').volume = 0;
         | 
| 316 | 
            +
             | 
| 317 | 
            +
                            remoteVideo.volume = 0;
         | 
| 318 | 
            +
                            remoteVideo.muted = true;
         | 
| 319 | 
            +
                            document.getElementById('remoteVideo').volume = 0;
         | 
| 320 | 
            +
             | 
| 321 | 
            +
                            // Request both audio and video streams
         | 
| 322 | 
            +
                            microphoneStream = await navigator.mediaDevices.getUserMedia({
         | 
| 323 | 
            +
                                audio: true,
         | 
| 324 | 
            +
                                video: { width: 1, height: 1 } // Minimal video for echo cancellation
         | 
| 325 | 
            +
                            });
         | 
| 326 | 
            +
             | 
| 327 | 
            +
                            localVideo.srcObject = microphoneStream;
         | 
| 328 | 
            +
                            await localVideo.play();
         | 
| 329 | 
            +
             | 
| 330 | 
            +
                            console.log('Active constraints:', microphoneStream.getAudioTracks()[0].getConstraints());
         | 
| 331 | 
            +
                            console.log('Microphone stream settings:', microphoneStream.getAudioTracks()[0].getSettings());
         | 
| 332 | 
            +
             | 
| 333 | 
            +
                            // Implement loopback hack for improved echo cancellation
         | 
| 334 | 
            +
                            const offerOptions = {
         | 
| 335 | 
            +
                                offerToReceiveAudio: true,
         | 
| 336 | 
            +
                                offerToReceiveVideo: false,
         | 
| 337 | 
            +
                            };
         | 
| 338 | 
            +
             | 
| 339 | 
            +
                            rtcConnection = new RTCPeerConnection();
         | 
| 340 | 
            +
                            rtcLoopbackConnection = new RTCPeerConnection();
         | 
| 341 | 
            +
             | 
| 342 | 
            +
                            rtcConnection.onicecandidate = e => e.candidate && rtcLoopbackConnection.addIceCandidate(new RTCIceCandidate(e.candidate));
         | 
| 343 | 
            +
                            rtcLoopbackConnection.onicecandidate = e => e.candidate && rtcConnection.addIceCandidate(new RTCIceCandidate(e.candidate));
         | 
| 344 | 
            +
             | 
| 345 | 
            +
                            rtcLoopbackConnection.ontrack = e => e.streams[0].getTracks().forEach(track => loopbackStream.addTrack(track));
         | 
| 346 | 
            +
             | 
| 347 | 
            +
                            microphoneStream.getTracks().forEach(track => rtcConnection.addTrack(track, microphoneStream));
         | 
| 348 | 
            +
             | 
| 349 | 
            +
                            const offer = await rtcConnection.createOffer(offerOptions);
         | 
| 350 | 
            +
                            await rtcConnection.setLocalDescription(offer);
         | 
| 351 | 
            +
                            await rtcLoopbackConnection.setRemoteDescription(offer);
         | 
| 352 | 
            +
                            const answer = await rtcLoopbackConnection.createAnswer();
         | 
| 353 | 
            +
                            await rtcLoopbackConnection.setLocalDescription(answer);
         | 
| 354 | 
            +
                            await rtcConnection.setRemoteDescription(answer);
         | 
| 355 | 
            +
             | 
| 356 | 
            +
                            // Use the loopback stream for audio processing
         | 
| 357 | 
            +
                            const source = audioContext.createMediaStreamSource(loopbackStream);
         | 
| 358 | 
            +
                            source.connect(analyser);
         | 
| 359 | 
            +
             | 
| 360 | 
            +
                            myvad = await vad.MicVAD.new({
         | 
| 361 | 
            +
                                onSpeechStart: () => {
         | 
| 362 | 
            +
                                    addLog('--- vad: speech start');
         | 
| 363 | 
            +
                                    updateVisualizer();
         | 
| 364 | 
            +
                                    if (isSpeaking) {
         | 
| 365 | 
            +
                                        addLog('User interrupted. Stopping bot speech.');
         | 
| 366 | 
            +
                                        stopCurrentAudio();
         | 
| 367 | 
            +
                                        isSpeaking = false;
         | 
| 368 | 
            +
                                    }
         | 
| 369 | 
            +
                                },
         | 
| 370 | 
            +
                                onSpeechEnd: (audio) => {
         | 
| 371 | 
            +
                                    addLog('--- vad: speech end');
         | 
| 372 | 
            +
                                    cancelAnimationFrame(animationId);
         | 
| 373 | 
            +
                                    processSpeech(audio);
         | 
| 374 | 
            +
                                }
         | 
| 375 | 
            +
                            });
         | 
| 376 | 
            +
             | 
| 377 | 
            +
                            await myvad.start();
         | 
| 378 | 
            +
                            startButton.textContent = 'End Call';
         | 
| 379 | 
            +
                            isListening = true;
         | 
| 380 | 
            +
                            addLog('System: Listening...');
         | 
| 381 | 
            +
                        } catch (error) {
         | 
| 382 | 
            +
                            console.error('Error starting VAD:', error);
         | 
| 383 | 
            +
                            addLog('System: Error starting voice detection. Please check your microphone and try again.');
         | 
| 384 | 
            +
                        }
         | 
| 385 | 
            +
                    }
         | 
| 386 | 
            +
             | 
| 387 | 
            +
                    async function stopListening() {
         | 
| 388 | 
            +
                        if (myvad) {
         | 
| 389 | 
            +
                            try {
         | 
| 390 | 
            +
                                await myvad.destroy();
         | 
| 391 | 
            +
                            } catch (error) {
         | 
| 392 | 
            +
                                console.error('Error stopping VAD:', error);
         | 
| 393 | 
            +
                            }
         | 
| 394 | 
            +
                            myvad = null;
         | 
| 395 | 
            +
                        }
         | 
| 396 | 
            +
                        if (microphoneStream) {
         | 
| 397 | 
            +
                            microphoneStream.getTracks().forEach(track => track.stop());
         | 
| 398 | 
            +
                            microphoneStream = null;
         | 
| 399 | 
            +
                        }
         | 
| 400 | 
            +
                        if (audioContext) {
         | 
| 401 | 
            +
                            await audioContext.close();
         | 
| 402 | 
            +
                            audioContext = null;
         | 
| 403 | 
            +
                        }
         | 
| 404 | 
            +
                        if (localVideo) {
         | 
| 405 | 
            +
                            localVideo.srcObject = null;
         | 
| 406 | 
            +
                        }
         | 
| 407 | 
            +
                        if (remoteVideo) {
         | 
| 408 | 
            +
                            remoteVideo.srcObject = null;
         | 
| 409 | 
            +
                        }
         | 
| 410 | 
            +
                        if (rtcConnection) {
         | 
| 411 | 
            +
                            rtcConnection.close();
         | 
| 412 | 
            +
                            rtcConnection = null;
         | 
| 413 | 
            +
                        }
         | 
| 414 | 
            +
                        if (rtcLoopbackConnection) {
         | 
| 415 | 
            +
                            rtcLoopbackConnection.close();
         | 
| 416 | 
            +
                            rtcLoopbackConnection = null;
         | 
| 417 | 
            +
                        }
         | 
| 418 | 
            +
                        loopbackStream = new MediaStream();
         | 
| 419 | 
            +
                        stopCurrentAudio();
         | 
| 420 | 
            +
                        startButton.textContent = 'Begin Call';
         | 
| 421 | 
            +
                        isListening = false;
         | 
| 422 | 
            +
                        addLog('System: Stopped listening.');
         | 
| 423 | 
            +
                        cancelAnimationFrame(animationId);
         | 
| 424 | 
            +
                        addLog('System: Microphone closed');
         | 
| 425 | 
            +
                      }
         | 
| 426 | 
            +
             | 
| 427 | 
            +
                    startButton.addEventListener('click', toggleListening);
         | 
| 428 | 
            +
                    clearLogsButton.addEventListener('click', () => {
         | 
| 429 | 
            +
                        logsDiv.innerHTML = '';
         | 
| 430 | 
            +
                    });
         | 
| 431 | 
            +
             | 
| 432 | 
            +
                    createVisualizer();
         | 
| 433 | 
            +
                    initializePipelines();
         | 
| 434 | 
            +
                </script>
         | 
| 435 | 
            +
            </body>
         | 
| 436 | 
            +
            </html>
         |