Well, that's decidedly odd!

The MIDI channel for all events on the melody track has changed to channel 4 and, if I now remove the Sforzando plug-in, I can get it to play the trombone.

I'm pretty sure it hadn't changed them to channel four after I altered the rest events from ch1 to ch6 to match the remainder, but it's changed now.

The difficulty is understanding exactly what I did to get that outcome.


Jazz relative beginner, starting at a much older age than was helpful.
Kawai MP6, Korg M50, Ui24R, Saffire Pro 40.
AVL:MXE Linux; Windows 11; Win8.1: Scarletts
BIAB2022 UltraPAK, Reaper, a bunch of stuff.