Lanny,

In BIAB, this is called "midi thru". You can assign an instrument by selecting "Thru" on the radio buttons at the top of the main screen. I believe the default is that it only plays while BIAB is playing and doesn't play while BIAB is paused (although you can see keys pressed on the on-screen keyboard).

Bruce


Macbook Pro 2018
2.6 GHz 6-core Intel Core i7, 16 GB RAM
OS Monterey
BIAB for Mac 2022