import { createReadStream, createWriteStream } from "fs";
import { AudioMixer } from "node-audio-mixer";

const mixer = new AudioMixer({ sampleRate: 48000, bitDepth: 16, channels: 2, autoClose: true });

const outputAudio = createWriteStream("mixed.pcm");

const audio1 = createReadStream("audio1.pcm");
const audio2 = createReadStream("audio2.pcm");

const input1 = mixer.createAudioInput({ sampleRate: 44100, bitDepth: 16, channels: 1 });
const input2 = mixer.createAudioInput({ sampleRate: 44100, bitDepth: 16, channels: 1 });

mixer.pipe(outputAudio);

audio1.pipe(input1);
audio2.pipe(input2);