Looping audio con AS3

var soundReq:URLRequest = new URLRequest("Assets/Audio/drums01.mp3");
var sound:Sound = new Sound();
var soundControl:SoundChannel = new SoundChannel();
sound.load(soundReq);
 
sound.addEventListener(Event.COMPLETE, onComplete);
 
 
function onComplete(event:Event):void{
    drums1_mc.addEventListener(MouseEvent.CLICK, playSound);
    drumsStop_mc.addEventListener(MouseEvent.CLICK, stopSound);
}
 
function playSound(event:MouseEvent):void{
    soundControl = sound.play();
}
 
function stopSound(event:MouseEvent):void{
    soundControl.stop();
}