Hi Kent
You can set midi thru to be track specific and as such it will play through whatever is connected or assigned to that track ,
in Realband’s Options / preferences / midi /midi thru / set track specific
This way if I am recording a trumpet by playing notes into a track while recording I hear a trumpet or what ever other instrument I choose on any track I hear that tracks voice ."

important:
See my full linked post earlier for details.
Mike


BIAB2021 UltraPlus,AsusN55S1Tbssd, W10/64,Akai EIEpro
Yamaha CVP405,SquireStrat, CoolsoftVMidSynth
Novatation Impulse61 Ctr kbd, Cwalk blab Kontakt

http://mikesmusic.byethost16.com/