Sound Manager

// Get IE or Edge browser version
var IEVersion = detectIE();

/**
 * detect IE
 * returns version of IE or false, if browser is not Internet Explorer
 */
function detectIE() {
  var ua = window.navigator.userAgent;

  // IE 10
  // ua = 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)';

  // IE 11
  // ua = 'Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko';

  // Edge 12 (Spartan)
  // ua = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0';

  // Edge 13
  // ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586';

  var msie = ua.indexOf('MSIE ');
  if (msie > 0) {
    // IE 10 or older => return version number
    return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
  }

  var trident = ua.indexOf('Trident/');
  if (trident > 0) {
    // IE 11 => return version number
    var rv = ua.indexOf('rv:');
    return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
  }

  var edge = ua.indexOf('Edge/');
  if (edge > 0) {
    // Edge (IE 12+) => return version number
    return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
  }

  // other browser
  return false;
}

if(IEVersion > 12)
var SoundManager = (function () {

  window.AudioContext = window.AudioContext || window.webkitAudioContext;

    /// custom buffer loader
    /// see http://www.html5rocks.com/en/tutorials/webaudio/intro/
    function BufferLoader(context, urlList, callback) {
        this.context = context;
        this.urlList = urlList;
        this.onload = callback;
        this.bufferList = new Array();
        this.loadCount = 0;
    }

    BufferLoader.prototype.loadBuffer = function (url, index) {
        // Load buffer asynchronously
        var request = new XMLHttpRequest();
        request.open("GET", url, true);
        request.responseType = "arraybuffer";

        var loader = this;

        request.onload = function () {
            // Asynchronously decode the audio file data in request.response
            loader.context.decodeAudioData(
            request.response,
            function (buffer) {
                if (!buffer) {
                    alert('error decoding file data: ' + url);
                    return;
                }
                loader.bufferList[index] = buffer;
                if (++loader.loadCount == loader.urlList.length) loader.onload(loader.bufferList);
            },
            function (error) {
                console.error('decodeAudioData error', error);
            });
        }

        request.onerror = function (e) {
            alert('BufferLoader: XHR error');
            console.log(e);
        }

        request.send();
    }

    BufferLoader.prototype.load = function () {
        for (var i = 0; i < this.urlList.length; ++i)
        this.loadBuffer(this.urlList[i], i);
    }

    /// setup audio context and start loading samples
    var actx = new AudioContext(),
        blst,
        bLoader = new BufferLoader(
        actx, [
              window.location.origin + '/mobile/sounds/closeToYou.wav',
              window.location.origin + '/mobile/sounds/arrivedAtLocation.wav',
            ],
        done),
        isReady = false;

    /// start loading the samples
    bLoader.load();

    /// when samples are loaded update status
    function done(bl) {
        blst = bl;
        isReady = true;
        $('#status').html('Ready!');
    }

    /// this sets up chain so we can play audio
    function play(i) {
        var src = actx.createBufferSource();
        src.buffer = blst[i];
        src.connect(actx.destination);
        src.start(0);
    }

    this.playCloseToMeLocation = function () {
        play(0);
    };

    this.playArrivedAtLocation = function () {
        play(1);
    };

  return this;
})();