If your using Crestron switchers/amps it's pretty easy to do in system builder. You have to go into the audio zone room feedback and look for the browse select list. You can base your conditionals for the feedback of the source buttons based on the audio zone room feedback. Look through some of the Prodigy programs system builder has created on the source select list and you will see what I am talking about. There should be a source name, whats playing, and the top header is the room selected. You can build your own list in a system based on how the programming works for Prodigy source select. I don't let system builder build anything for my projects. I do all the programming manually. Once you get the back bone of a couple of different style systems it's really easy to implement on other systems.