Checking to see if sound sound file has finished on timeline

Hi everyone,

I'm using the actionscript code below to load a .mp3 file and then it checks to see when the sound is complete and then runs a function which fades another movieclip.

The code works as expected but as I need to synchronise another animation with the sound, I thought it would be easier to have the sound file on the timeline itself instead of loading it using actionscript. If I do it that way though, I still need to use actionscript to check when the sound has finished playing so that the "advertEnd" function can run.

Can someone tell me how I'd revise the code below so that it only checks to see if the sound has finished and runs the function?

Appreciate any advice.

var req:URLRequest = new URLRequest("sound.mp3");
var sound:Sound = new Sound();
var channel:SoundChannel;

function soundLoaded(event:Event):void
{
	channel = sound.play();
    if( !channel.hasEventListener( Event.SOUND_COMPLETE ) ){
            channel.addEventListener( Event.SOUND_COMPLETE, advertEnd );
       }
}

sound.addEventListener(Event.COMPLETE, soundLoaded);
sound.load(req);


function advertEnd(e:Event):void
	{
		trace("FLV has ended");
		stage.addEventListener(Event.ENTER_FRAME, fadeAdvert);
	}

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