Here's what the problem was: My melody track is using the Plogue Sforzando plugin, which does not support program change messages sent from BIAB.

I'm kind of annoyed, as I liked the sax sound from the HiQ MIDI sound that I used, but I suppose I should be more annoyed with Plogue Sforzando than with BIAB.


Band-in-a-Box® for Windows
Version 2025 (1128)
64 bit application
RealBand 2025 (5)
Windows 10 Pro 64-bit
Intel Core i7 4800MQ @ 2.70GHz
Haswell 22nm Technology
16.0GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)