The P-90 digital piano is not a GM/XG MIDI device. That is, it does not contain the standard MIDI bank of 128 instruments that BIAB is designed to work with, instead it has a rather truncated set of patches that consists of a few pianos, strings, etc.

Any horns, or other GM patches are unavailable for BIAB to use, plus the voices you do have are assigned to patch numbers that BIAB does not recognize, very likely that the piano is all on one MIDI channel also.

You could use the keyboard as a MIDI controller, though, using the VSC DXi that ships with BIAB as your software realtime GM MIDI synthesizer.


--Mac