vad/mic-processor.js

class MicProcessor extends AudioWorkletProcessor {
  process(inputs) {
    const input = inputs[0];
    if (input.length > 0) {
      const channel = input[0];
      const samples = channel.slice();
      this.port.postMessage(samples, [samples.buffer]);
    }
    return true;
  }
}

registerProcessor("mic-processor", MicProcessor);