Setting multiple tone pairs is common for the local county dispatch. It would be nice that you could detect multiple agencies tones sent as part of a set. Between 'closest unit resonse', Mutual aid agreements, staff support, and dual responses, they seem to rarely send just a single tone pair.
Sorry folks, I know a lot of people have been asking for this, but I don't have any real line of sight to making it happen. It would essentially be an entirely new program from the ground up, and even then it wouldn't be easy, if it's even possible. At least in XP, only one process can have the sound card at a time, and the way the program is written, tone detection and recording are entirely separate events, so you can't do both at the same time. Vista is more flexible in that regard, but I'm not about to put something out that would only work in Vista. The only solution I can think of is to run multiple instances of the program for each tone set, but that also requires multiple sound cards. The program was written to somewhat mimic the operation of a pager, and pagers won't do what's being requested.
Andy