It would seem that the best way to handle this would be to have a priority on the inputs to mute the other sources. The detector would have the highest priority, cell phone 2nd, FRS radio 3rd and mps player none. That way whatever the source would have an uninterupted source. Is there anywhere someone could go to learn how to configure such a setup? New to electronics but this has peaked my interest. Also, how are the throat mikes for talking on an frs or cell while on a bike?