gistfile1.js

window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       || 
          window.webkitRequestAnimationFrame || 
          window.mozRequestAnimationFrame    || 
          window.oRequestAnimationFrame      || 
          window.msRequestAnimationFrame     || 
          function(callback){
            window.setTimeout(callback, 1000 / 60);
          };
})();

function startAudio(song_raw) {
  try {
    initializeCanvas();
    recompileWAVFormatToNative(song_raw);
    audioHandle = new XAudioServer(channels, sampleRate, sampleRate >> 2, sampleRate << 1, audioCheck, 0);

    (function animloop(){
      requestAnimFrame(animloop);
      audioHandle.executeCallback();
    })();
    
  }
  catch (e) {
    alert(e.message);
  }
}