OK, dMurphy - I get the same message you're describing ("Instrument: no patch change"), but it actually DOES change the patch for me. This message is obviously a program bug.

Can you select an all midi style and tell me if you get any sound at all when you play BIAB with that (select one of the old ZZ styles way at the bottom in the style selector (these are all midi styles). You may hear drums if you've got real drum substitutions enabled (I think that is the default). I'm suspecting that you are hearing the real styles (which are audio) but that you are not hearing any generated midi sounds.

If using one of the ZZ styles produces no sounds (or you hear drums only), then I'd suggest to go to the MIDI menu in BIAB, and choose the item "** select MIDI driver or Apple DLS synth". Open this, and select "Apple DLS synth (built in Mac sounds)". Now play BIAB using one of the "ZZ" styles. Do you hear all the band sounds now? If so, now try playing your keyboard - you should hear sound. Again, on my end, selecting a patch DOES work, but I get the same message you describe in the mixer.

Wow, hope that helps some.

Bruce

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