Hi Dave,
Maybe I'm missing something too

but when I use all (4) outputs and global them correctly, I get separate control over mic and keyboard. Is this overkill?
_________________________
Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO