Controlo de Volume AS 3.0

Queria controlar o som numa aplicação mas se na página principal baixar o som e mudar de página não reconhece e fica como se estivesse normal..Gostaria de saber como se faz o controlo de todo o som da aplicação.

tenho este código:

//declare a importedSound sound object that loads a library sound

var myAudioJP:vazio = new vazio();

var myChannelJP:SoundChannel = new SoundChannel();

 

myChannelJP = myAudioJP.play();

mute_mc.buttonMode = true;

mute_mc.gotoAndStop(2);

//an event listener to check if the music on off button is clicked

mute_mc.addEventListener(MouseEvent.MOUSE_UP, muteSoundJP);

function muteSoundJP(event:MouseEvent):void {

	if (mute_mc.currentFrame == 1) {

 for(var nJP:Number = 1; nJP<5; nJP++) {

 this["vol" + nJP].alpha = 1

 }

 //All sound channels

 SoundMixer.soundTransform = new SoundTransform(1);

 mute_mc.gotoAndStop(2);

	} else {

 for(nJP = 1; nJP<5; nJP++) {

 this["vol" + nJ].alpha = 0.5

 }

 SoundMixer.soundTransform = new SoundTransform(0);

 mute_mc.gotoAndStop(1);

	}

}

//an event listener to check if the volume button is clicked

for(var nJP:Number = 1; nJP<5; nJP++) {

	this["vol" + nJP].vol = nJP

	this["vol" + nJP].addEventListener(MouseEvent.MOUSE_UP, changeVolumeJP);

	this["vol" + nJP].buttonMode = true

}

 

function changeVolumeJP(e:Event):void {

	//Without a sound channel:

	var sTransform:SoundTransform = new SoundTransform();

	sTransform.volume = (e.currentTarget.vol/6 * 100) * 0.01;

	myChannelJP.soundTransform = sTransform;

 

	for(var nJP:Number = 1; nJP<5; nJP++) {

 if(nJP < e.currentTarget.vol + 1) {

 this["vol" + nJP].alpha = 1

 } else {

 this["vol" + nJP].alpha = 0.5

 }

	}

}

 

myChannelJP.addEventListener(Event.SOUND_COMPLETE, myPlaybackCompleteJP);

function myPlaybackCompleteJP(event:Event):void {

	myChannelJP = myAudioJP.play();

}