const optimalConfig = {
    audioEncoding: 'linear16',
    audioSampleRate: '16000',
    audioChannels: '1',        // Mono for efficiency
    addPunctuation: 'true',
};

// Audio preprocessing example
function preprocessAudio(audioBuffer) {
    const processedBuffer = new Float32Array(audioBuffer.length);
    
    // 1. Normalize audio levels
    const maxValue = Math.max(...audioBuffer.map(Math.abs));
    const normalizationFactor = maxValue > 0 ? 0.8 / maxValue : 1;
    
    // 2. Apply normalization and basic filtering
    for (let i = 0; i < audioBuffer.length; i++) {
        let sample = audioBuffer[i] * normalizationFactor;
        
        // Simple high-pass filter to reduce low-frequency noise
        if (i > 0) {
            sample = sample - 0.95 * processedBuffer[i - 1];
        }
        
        processedBuffer[i] = sample;
    }
    
    return processedBuffer;
}

// Apply in audio processor
processor.onaudioprocess = (e) => {
    const inputData = e.inputBuffer.getChannelData(0);
    const processedData = preprocessAudio(inputData);
    
    // Convert to Int16 and send
    const int16Data = new Int16Array(processedData.length);
    for (let i = 0; i < processedData.length; i++) {
        int16Data[i] = Math.max(-32768, Math.min(32767, processedData[i] * 32768));
    }
    
    if (ws.readyState === WebSocket.OPEN) {
        ws.send(int16Data.buffer);
    }
};