Since you are starting with a "blank sheet" then I change my opinion to Windows and use RealBand. It is a perfect match for BiaB and number of members here produce pro sounding songs with it. If in the future you want to pursue other DAWs the transition shouldn't be that hard.

Last edited by MarioD; 11/10/20 08:56 AM.

Unclear if the pianist is a total beginner or a professional jazz player?

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