gapless sync and playback  audio as3

I have 37 sounds that are all the same bpm.  I would like them to sync with each other when their button is clicked to be played.  
Currently I sync the sounds to a background sound using the sound_complete listener. It works but
the sound become slightly out of sync becuse I am relying on the flash sound_complete event listener.   If I just loop them play(0,9999); they loop great but I cannot sync them with each other.   Any solutions to this?

var sndSync:Sound = new b3();
var chnSync:SoundChannel=sndSync.play();
var myVolume003:Number=0; 
    var myTransform003:SoundTransform=new SoundTransform(myVolume003); 
        chnSync.soundTransform=myTransform003; 
		
chnSync.addEventListener(Event.SOUND_COMPLETE, loopSoundf);
function loopSoundf(e:Event):void{
	   
		chnSync = sndSync.play();
		chnSync.addEventListener(Event.SOUND_COMPLETE, loopSoundf);
		chnSync.soundTransform=myTransform003; 
		  
	}
	
	syncer.addEventListener(MouseEvent.MOUSE_DOWN,soundonlySync);
	stopper.addEventListener(MouseEvent.MOUSE_DOWN,soundonlySync);
function soundonlySync(event:MouseEvent){
		chnSync.stop();
		chnSync = sndSync.play();
		chnSync.soundTransform=myTransform003; 
		chnSync.addEventListener(Event.SOUND_COMPLETE, loopSoundf);
	}

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