According to the AS3 documentation you can loop a sound by passing in a loop number argument when you call play on a sound. Apparently, that never seems to work consistently for me. Sometimes it would not loop after a number of times, or it doesn’t loop immediately. So I usually just manually control the looping of music with Event Listeners.

To do this, I add an Event Listener to the music channel that will call a function to replay the sound whenever it’s done playing once.

public function playMusic():void
{
    musicChannel = music.play();
    musicChannel.addEventListener(Event.SOUND_COMPLETE, loopMusic);
}

public function loopMusic(e:Event):void
{
    if (musicChannel != null)
    {
        musicChannel.removeEventListener(Event.SOUND_COMPLETE, loopBackgroundMusic);
	playMusic();
    }
}

So the sound will continue to loop forever until I stop it. Whenever I do, I have to remove the Event Listener from the music channel or else it won’t be garbage collected.

public static function stopMusic():void
{
    if (musicChannel != null)
    {
	musicChannel.stop();
	musicChannel.removeEventListener(Event.SOUND_COMPLETE, loopMusic);
    }
}

That’s about it. A pretty simple solution to an annoying problem sometimes.

Tags: actionscript 3, programming

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