Automator Scripts for music and sound etc

I've got Automator but I don't have any scripts that will convert from one audio format to another e.g. aiff to mp3, etc. Does anyone know where i can download the actions for stuff like that.

Cheers

Have you checked apple's page of automator actions?
http://www.apple.com/downloads/macosx/automator/index_abc0.html

yeah i have but it doesnt have what I'm after.