add repeat sound and More mp3 to this player

hi , i have simple Start/pause/Stop Mp3 player

here is action script :

//imports the necessary as events
import flash.events.Event
import flash.events.MouseEvent;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.net.URLRequest;
var isPlaying:Boolean = new Boolean();
var pausePosition:Number = new Number();
//Create an instance of the Sound class
var soundClip:Sound = new Sound();
//Create a new SoundChannel Object
var sndChannel:SoundChannel = new SoundChannel();
//Load sound using URLRequest
soundClip.load(new URLRequest("song.mp3"));
//Create an event listener that wll update once sound has finished loading
soundClip.addEventListener(Event.COMPLETE, onComplete, false, 0, true);
controller.addEventListener(MouseEvent.MOUSE_DOWN, btnPressController, false, 0, true);
stop_btn.addEventListener(MouseEvent.MOUSE_DOWN, btnPressStop, false, 0, true);
function onComplete(evt:Event):void {
    //Play loaded sound
    sndChannel = soundClip.play();
    isPlaying = true;
}
function btnPressController(evt:MouseEvent):void
{
    switch(isPlaying)
    {
        case true:
            controller.gotoAndStop(2);
            pausePosition = sndChannel.position; 
            sndChannel.stop();
            isPlaying = false;
        break;
        case false:
            controller.gotoAndStop(1);
            sndChannel = soundClip.play(pausePosition);
            isPlaying = true;
        break;
    }
}

function btnPressStop(evt:MouseEvent):void
{
    pausePosition = 0;
    sndChannel.stop();
    controller.gotoAndStop(2);
    isPlaying = false;
}

but now i need to add Repeat Function to repeat Sound , i add this script :

soundClip.addEventListener(Event.SOUND_COMPLETE,introloop);

function introloop(e:Event):void {

    sndChannel = soundClip.play(0, 9999);

    isPlaying = false

}

but it now work.

any help ??  thanks ...

Also It will be Great if Help me to add more Than One sound ( maybe With Next sound bt )