Hi Russell

To achieve what you are trying to do I use the mixer function in RealBand - make your arrangement in BIAB then open it in RealBand and with the mixer open record in real time and either mute/unmute or use the sliders to bring in/out the soloist as you require
Brian


BIAB - RealBand - 2022
Windows 10 64
Zoo computer with 7i processor- SSD 1TB -2TB HDD
Roland keyboards