Speed ​​up the audio on this code

!

Speed ​​up the audio on this code

var musicChannel:SoundChannel;
var currentSongIndex:int;
function  onPlayBtnPressed() {
  currentSongIndex = 0;
  playSongFromIndex(currentSongIndex);
}
function playSongFromIndex(songIndex:int) {
  musicChannel = ars[songIndex].play();
  musicChannel.addEventListener(Event.SOUND_COMPLETE, songFinished);
  currentSongIndex++;
}
function songFinished(e:Event) {
  if (currentSongIndex < ars.length) {
       playSongFromIndex(currentSongIndex);
  } else  {
       currentSongIndex=0;
  }
}

You can apply this code to the top code

var sourceSnd:Sound = new sou1(); 
var outputSnd:Sound = new Sound(); 
 outputSnd.addEventListener(SampleDataEvent.SAMPLE_DATA, processSound);
 outputSnd.play();
function processSound(event:SampleDataEvent):void {
    var bytes:ByteArray = new ByteArray();
    sourceSnd.extract(bytes, 4096);
    event.data.writeBytes(upOctave(bytes)); }
function upOctave(bytes:ByteArray):ByteArray {
    var returnBytes:ByteArray = new ByteArray();
    bytes.position = 0;
    while(bytes.bytesAvailable > 0)
    {
        returnBytes.writeFloat(bytes.readFloat());
        returnBytes.writeFloat(bytes.readFloat());
        if (bytes.bytesAvailable > 0)
        {
            bytes.position +=8;
        }
    }
    return returnBytes;
}
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