External Sound Play Button

[Geos59]

This is code loads the music internally:

var url:String = "C:/Users/George/Desktop/erevemusic.mp3";
var urlRequest:URLRequest = new URLRequest(url);
var sound:Sound = new Sound();
sound.load(urlRequest);
sound.play();

And this makes it so when you click the button it stops the music:

ToggleButton.addEventListener(MouseEvent.CLICK, beQuiet);
function beQuiet(e:MouseEvent):void
{
SoundMixer.stopAll();
}

What code do I need to click on ToggleButton button for the music to play again?