Yes, typically ASIO is best when used with only one program that addresses audio drivers running at the same time. There are, however, examples where ASIO can be used in two programs at the same time. Inside BiaB, in the MIDI/Audio settings window, pushing the Audio button you should find a toggle, "ASIO Always On" that defaults to true. You can try unchecking that and see if it helps, although usually keeping it checked is what helps.

Also -- Any soundcard where the ASIO drivers can be set separately within the soundcard's control software to any bitrate and depth other than 44.1/16 can cause error messages when opening Band in a Box. This is because Band in a Box is designed only to work at 44.1/16. Band in a Box wants control of the soundcard to set it to that and some mfr's designed their software to allow manual selection of other bitrates. BB often can't change that. Try changing to that bitrate and depth inside your soundcard control software, or perhaps there is a setting there that allows any host program to choose when opened, that can work as well. This problem is typically only for ASIO drivers as choosing MME drivers will likely already be at that bitrate anyway.


--Mac