As3 Sound Object

Does anyone know if it’s possible to replace a sound url request in CS3?

ie, if I am requesting an mp3 be creating an object, can’t I change it’s url request and then playing that object should play the sound…

I have tried a whole bunch of things, but am starting to wonder if it’s even possible…

Sixth = someFileNameThatChanges;

var s6:URLRequest = new URLRequest(“tuner/”+Sixth+".mp3");
var SixthString:Sound = new Sound(s6);

nevermind I got it by building a new movieclip everytime… though I wonder what the effect would be having so many new movieclips created…