Fading out volume on a movieClip - actionscript-3

Question

I've looked around the net on this issue, and came up with the following code to fade out the volume on my movieclip:
var myTransform = new SoundTransform();
myTransform.volume = 1;
loaderClip2[indexNumber].soundTransform = myTransform;
audioTween = new TweenLite(myTransform, 2, {volume:0});
My movie clip is stored in the Array loaderClip2 at index position determined by the variable indexNumber. This code does not produce the desired fade. Can anyone see what is the problem here?

Answer 1

var myTransform:SoundTransform = new SoundTransform(1);
TweenLite.to(myTransform, 1, {volume:0, onUpdate:updateChannel, onUpdateParams:[indexNumber]});
function updateChannel(index:int):void {
loaderClip2[index].soundTransform = myTransform;
}

Answer 2

Try this code:
private function updateChannel() : void {
var st : SoundTransform = new SoundTransform(loaderClip2[indexNumber].soundTransform.volume, 0 );
loaderClip2[indexNumber].soundTransform = st;
}
TweenLite.to(loaderClip2[indexNumber], 4, { volume:.5, ease:Strong.easeInOut, onUpdate:updateChannel } );
Set your own parameters

Answer 3

Alright guys, after trying everything possible with tweenlite, I figured out another solution using good-old-fashioned ENTER_FRAME events. This is as straight-forward as possible, wish I had thought of it before:
so in a previous function I just do this:
myClip.addEventListener(Event.ENTER_FRAME, fadeAudio);
and then later flush out the event function (or whatever it is called):
var audioshift = 1;
function fadeAudio(e : Event) : void {
audioshift -= .05;
if (audioshift <= 0) {
audioshift = 0;
trace("fadeAudio complete");
e.target.removeEventListener(Event.ENTER_FRAME, fadeAudio);
}
var st : SoundTransform = new SoundTransform(audioshift, 0);
e.target.soundTransform = st;
}
Easy as pie.