Thanks.

This is indeed perplexing because, as you say, you don't have the option of assigning synths to the Piano, Bass, Guitar, etc., tracks.

When BIAB stops doing what it usually does, I nearly always interpret that as a sign that a factory reset is worth considering.

With this in mind, I suggest the following (this is ultimate form of factory reset)...

1. Close BIAB

2. Go to the \bb folder and rename "intrface.bbw" and "mysetup.dk" to something like "intrface.bbw.old" and "mysetup.dk.old". (NOTE the spelling of 'intrface.bbw', there's no 'e'.)

3. Restart BIAB.

4. Renaming the above effectively removes them from BIAB's gaze and forces the program to create new files.

5. After the above, you'll need to set your midi and audio drivers up again. This includes setting the VST/DXi driver.

Let us know how you go.

MY SONGS...
Audiophile BIAB 2025