av/cmd/audio-player/main.js

window.onload = function () {
    document.getElementById('input').addEventListener('change', playFile)
}

function playFile() {
    const input = event.target.files[0]

    const reader = new FileReader()
    reader.onload = event => playData(event.target.result) // desired file content
    reader.onerror = error => reject(error)
    reader.readAsArrayBuffer(input) // you could also read images and other binaries
}

function playData(array){
    var data = new Uint8Array(array)
    console.log("playing file")
    var player = new PCMPlayer({
        encoding: '16bitInt',
        channels: 1,
        sampleRate: 48000,
        flushingTime: 2000
    });
    player.feed(data)
}