If your MOTU uses multi-client ASIO drivers then you can use ASIO with both BiaB and Sonar. As AT suggested you can increase the buffers but that may yield latency in Sonar, you would have to check that out as I do not have a MOTU audio interface.

For many years I have been successfully running BiaB with MME drivers and ASIO drivers in my DAW. Using these two drivers I can run BiaB and my DAW simultaneously with absolutely no problems. I have used this method with a number of DAWs, including Sonar.


The bumper sticker said "I'm a veterinarian, therefore I can drive like an animal".
Suddenly I realized how many proctologists are on the road.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware