This video shows how to create sound visuals that animate to the beat by creating a channel for the sound object. That way we can access the left and right peaks. // Define the sound object and the sound channel var snd:Sound = new Sound(); var req:URLRequest = new URLRequest("mp3_files/raquel my body.mp3"); snd.load(req); var channel:SoundChannel; channel = snd.play(); status_txt.text = "The song is now playing"; // Enter Frame Event // We are going to use this for more sound control addEventListener(Event.ENTER_FRAME, onEnterFrame); function onEnterFrame(event:Event):void { leftpeak_txt.text = ""+(Math.round(channel.leftPeak * 100)); rightpeak_txt.text = ""+(Math.round(channel.rightPeak * 100)); leftBar.height = (Math.round(channel.leftPeak * 100)); rightBar.height = (Math.round(channel.rightPeak * 100)); } // Sound completion event function and its listener channel.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete); function onPlaybackComplete(event:Event){ removeEventListener(Event.ENTER_FRAME, onEnterFrame); status_txt.text = "The song is over"; }