Have carried out the MIDI mapping test you suggested in your last post.
All editing was done on the H9 itself, MIDI messages were sent using two different MIDI controllers and two different cables. Both controllers and cables have been proven to work, as expected, with other FX units. The H9 was tested, both in the MIDI chain on my current board and connected directly to each controller in turn.
I used the MIDI mapping that you recommended: 8:32, 9:33, 10:34. The resaults were consistant no matter what the controller/cable configuration was.
8:8, 9:32, 10:33. This is very confusing. 8:8 is consistant with the problem thet I’d been having, yet, 9:32, and 10:33 are more understanable in MIDI terms.