Multiple audio sources?

If you have multiple audio sources attached to an object, how can I determine which one will play depending on a condition (I want to set something up like "If A=true play clip 1, if B=true play clip 2, etc.)?

EDIT- I tried to play a clip but I get an error about Play not being a member of "UnityEngine.AudioClip".

var BEAT          = 0;
var BEAT1 : AudioClip;

function Update(){
    if((Input.GetKeyDown( "w" )) && BEAT==1){BEAT1.Play();}
}

if clip1 and clip2 are AudioSources

if (A)
  clip1.Play();
if (B)
  clip2.Play();

etc.