Although you have a solution, I would like to offer another alternative.

The ALT F2 feature (or File > Save Song with Patches & Harmony) allows you to turn instruments / tracks "On" or "Off" for each song. If you uncheck the track, the instrument shows up white (rather than green, yellow or blue) in the mixer and is silent.

It's similar using F5 to mute the track but essentially eliminates the track from the song.

I use BIAB 2013 so it may be different in newer releases


BIAB for Windows Version 2019 (643)
Windows 10 (1909)