simple sound question

I want to have a sound, in my library, that I can play automatically using functions.
To clarify:
I don't want to attach the sound to any MC or put it on a frame. I want to leave it on the library, with they 'export for action script', and use a function located on a layer to play that sound.

in the layer, I would have something like this,

theInterval = the setInterval(soundFunction, 2000); // call function every 2 seconds

functin soundFunction(){
// code here to play the sound in the libray

}


thanks