Hi Noel and Mac,

I did a bit of digging after my last post and also contacted PG Music Support.
Support confirmed that "ASIO drivers often take over a device to the extent that another program can't use the sound card, and when that happens, there's very little that we can do about it."

I have. however, discovered a fairly inexpensive solution to the problem. I purchased a Behringer U-Control UCA222 which is a ultra low latency 2in/2out USB Audio Interface which uses ASIO drivers. This enables BIAB and Pianissimo to work together using ASIO drivers

Ken