Play (mp3) audio file with AudioContext

play.js

window.onload = function(){
    var context = new AudioContext() || new webkitAudioContext(),
        request = new XMLHttpRequest();
    
    request.open("GET", "audio_file.mp3", true);
    request.responseType = "arraybuffer";
    request.onload = function(){
        context.decodeAudioData(request.response, onDecoded);
    }
    
    function onDecoded(buffer){
        var bufferSource = context.createBufferSource();
        bufferSource.buffer = buffer;
        bufferSource.connect(context.destination);
        bufferSource.start();
    }
    
    request.send();
};