How to trigger an event when any sound in a soundchannel completes

It does not seem to be triggering. Here's my code:

channel2.addEventListener(Event.SOUND_COMPLETE, nextHandler);

var dec:Number = 2;
var seconds:Number = 0;
var countseconds:Number = 2;

var timer:Timer = new Timer(dec*1000);
timer.addEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);

function nextHandler(evt:Event){
timer.start();
trace("start");
}

function timerComplete(evt:Event){
timer.stop();
trace("Complete");
}

For the purposes of testing, I excluded the junk that used "seconds," "countseconds," etc. I'm just right now trying to get a "start" text in output, but I can't.

I must note that the sounds I play in the channel are determined by a switch statement, so creating a "sound_complete" for each of them is rather tedious and impractical.