I need help changing the Muzak station where I work. It's playing the most horrendous elevator crap and it's driving me mad. If anyone can point the way to a faq/online instruction manual on how to switch stations would be much appreciated. As far as I can tell from the unit is that it's a prism system and the only control I can find is the main volume. Also if anyone happens to know a decent channel that would help as well. I'm personally looking for some type of death metal to wake the place up :smt045 .