What you are trying to do is easy in a DAW. In BiaB have the piano play for the whole measure. Drag and drop the tracks into a DAW. On that measure use volume automation to fade the piano, then at the start of the next measure sharply bring the volume back to normal.


Life is short so make sure you spend as much time as possible on the Internet arguing with strangers.

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