https://askfeather.ai/audio-processor.js

1class AudioRecorderProcessor extends AudioWorkletProcessor {
2  // Maximum value for 16-bit signed integer
3  static INT16_MAX = 32767;
4
5  process(inputs, outputs, parameters) {
6    // Get the first input's first channel
7    const input = inputs[0][0];
8    
9    if (!input) return true;
10
11    // Convert Float32Array to Int16Array
12    const int16Array = new Int16Array(input.length);
13    for (let i = 0; i < input.length; i++) {
14      int16Array[i] = input[i] * AudioRecorderProcessor.INT16_MAX;
15    }
16
17    // Send the audio data to the main thread
18    this.port.postMessage({
19      audioData: int16Array
20    });
21
22    return true;
23  }
24}
25
26registerProcessor('audio-recorder-processor', AudioRecorderProcessor);