Just a little follow-up, I tried the wiring for this but I found that if I set up a stereo insert, the H90 treats the entire program as stereo even after forcing mono at the global level if only output 1 is sent to an amp.
Outputting to two amps correctly went in stereo but I could not get any program to automatically sum mono or force mono when only connected to one amp – is this expected behavior? Attached some pics of what I would expect to force to mono, initially automatically based on what I’ve read but then when I tried to force it
