Save buffer to mp3 file about lamejs HOT 2 CLOSED

var lamejs = require('lamejs');
var fs = require('fs');

function encodeMono(channels, sampleRate, samples) {
    var buffers = [];
    var mp3enc = new lamejs.Mp3Encoder(channels, sampleRate, 128);
    var remaining = samples.length;
    var maxSamples = 1152;
    var length = 0;
    for (var i = 0; remaining >= maxSamples; i += maxSamples) {
        var mono = samples.subarray(i, i + maxSamples);
        var mp3buf = mp3enc.encodeBuffer(mono);
        if (mp3buf.length > 0) {
            length += mp3buf.length;
            buffers.push(Buffer.from(mp3buf));
        }
        remaining -= maxSamples;
    }
    var d = mp3enc.flush();
    if(d.length > 0){
        length += d.length;
        buffers.push(Buffer.from(d));
    }

    var mp3data = Buffer.concat(buffers, length);
    
    fs.writeFile('test.mp3', mp3data);
}

function toArrayBuffer(buf) {
    var ab = new ArrayBuffer(buf.length);
    var view = new Uint8Array(ab);
    for (var i = 0; i < buf.length; ++i) {
        view[i] = buf[i];
    }
    return ab;
}

var wavFile = "./Left.wav";

fs.readFile(wavFile, (err, data) => {
    let audioData = toArrayBuffer(data);
    var wav = lamejs.WavHeader.readHeader(new DataView(audioData));
    var samples = new Int16Array(audioData, wav.dataOffset, wav.dataLen / 2);
    encodeMono(wav.channels, wav.sampleRate, samples);
});