Sound Control

var music:Sound = new Sound();
music.load(new URLRequest("music.mp3"));
var channel:SoundChannel = new SoundChannel();

music.addEventListener(Event.COMPLETE, soundComplete);
function soundComplete(e:Event):void
{
    //Remove COMPLETE event listener
    music.removeEventListener(Event.COMPLETE, soundComplete);
    //Play the sound
    channel = music.play();
    //Add the ENTER_FRAME event listener
    addEventListener(Event.ENTER_FRAME, checkPosition);
};

function checkPosition(e:Event):void
{
    //Divide the channel current position by the lenght of the loaded sound
    //multiply by 100, and round to get the percentage.
    var percentage:int = Math.floor((channel.position / music.length) * 100);

    //If percentage == 50, the sound is at half.
    if(percentage == 50)
    {
        trace("Sound is at half");
    }
    trace(percentage+ "%");
};

channel.addEventListener(Event.SOUND_COMPLETE, function(e:Event):void
{
//Sound finished playing, what to do?
//Remove the checkPosition event listener
removeEventListener(Event.ENTER_FRAME, checkPosition);
});