BiaB is not the answer for this you need to get the basic song file started there using a good gm midi set and then move over to RB or some other DAW


HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB 2025, Realband, Reaper 7, Harrison Mixbus 9 32c , Melodyne 5 editor, Presonus Audiobox 1818VSL, Presonus control app.