sound.js

var soundManager = {
    clips: {},
    context: null,
    gainNode:null,
    loaded:false,
    init: function() {
        this.context = new AudioContext();
        this.gainNode = this.context.createGain ? this.context.createGain(): this.context.createGainNode();        this.gainNode.connect(this.context.destination);
    },
    load: function(path, callback){
        if(this.clips[path]) {
            callback(this.clips[path]);
            return;
        }
        var clip = {path: path, buffer: null, loaded: false};
        clip.play = function (volume,loop) {
            soundManager.play(this.path,{looping: loop? loop : false, volume: volume ? volume : 1});
        };
        this.clips[path] = clip;
        var request = new XMLHttpRequest();
        request.open('GET',path,true);
        request.responseType='arraybuffer';
        request.onload = function () {
            soundManager.context.decodeAudioData(request.response, function(buffer){
                clip.buffer = buffer;
                clip.loaded = true;
                callback(clip);
            });
        };
        request.send();
    },
    loadArray: function(array){
        for(var i =0; i< array.length; i++) {
            soundManager.load(array[i],function() {
                if(array.length === Object.keys(soundManager.clips).length) {
                    for(sd in soundManager.clips)
                        if(!soundManager.clips[sd].loaded)
                            return;
                    soundManager.loaded = true;
                }
            });
        }
    },
    play: function(path, settings){
        if(!soundManager.loaded) {
            setTimeout(function() {soundManager.play(path, settings);},1000);
            return;
        }
        var looping = false; 
        var volume = 1;
        if(settings) {
            if(settings.looping)
                looping = settings.looping;
            if(settings.volume)
                volume = settings.volume;   
        }
        var sd = this.clips[path];
        if(sd === null)
            return false;
        var sound = soundManager.context.createBufferSource();
        sound.buffer = sd.buffer;
        sound.connect(soundManager.gainNode);
        sound.loop = looping;
        soundManager.gainNode.gain.value = volume;
        sound.start(0);
        return true;
    },
    stopAll: function() {
        this.gainNode.disconnect();
    }
};