ActionScript 3.0 :: One Function For Multiple Keys?

I'm building a menu for a website that plays a sound each time you mouse over one of the buttons. (each button is a piano key) I've written two functions that change the size of each key on ROLL_OVER and ROLL_OUT events. What I want is someway to play a unique sound in my library for each key, without writing a separate function for each key. Either a new function, or just written into my existing ROLL_OVER function. Currently, it plays the same sound for every key.

Here is a zip of my project

[URL]

What I've got in there is a fla file called menu.fla In that file there is a movieclip on stage called "keyboardmenu" and inside that movieclip are 8 movieclip's (my buttons) each with a unique instance name. In the library there are 8 mp3 files with class name keysound1, keysound2 etc...Here is my code: ( I'm using tweener to handle the scaling. )

Code:
import caurina.transitions.Tweener;
function keyisdown(e:MouseEvent):void{
Tweener.addTween(e.currentTarget,{height:185, width:80, time:.25, transition:"easeOutBounce"});
varsound1.play();

[code]....