Musical game mute and unmute trigger soundsource

(extreme noob question im sure)

i am creating a game in which i can create the elements of a song (different tracks) by shooting through trigger cubes.
at the moment all i can get is a mess off sounds that dont sync.

i was wondering if there is a way to play all the sounds at the same time but have them on mute, then to be able to unmute and mute a cubes sound source everytime it is triggered by a rigidbody. that way they would all be in time if i kept it at a steady tempo and time signeture.

any ideas?

This is tested and working. I have 2 Cubes on stage , both with an Audio Source, Audio Clip loaded in the Inspector, Play-on-awake is toggled OFF .

The main script (hopefully) shall start all the cubes playing together (in sync).

#pragma strict

var cube1 : Transform;
var cube2 : Transform;
private var cubeSelected : Transform;

function Awake () {;; = false; = false;

function Update () {
	if (Input.GetKeyDown(KeyCode.Mouse0))
		var rayHit : RaycastHit;
		if(Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), rayHit))
			cubeSelected = rayHit.transform;
			// mute / unmute selected cube
			if ( { = false;
			} else { = true;

This would be good for an on-the-fly mixer. If you wanted to have only one cube playing , you would have to code that in so all are mute except the selected.