H9 Midi

The output level isn't currently controllable via MIDI, and the underlying reason for this is that modulating the output level with a continuous controller will cause clicks in the signal.  

I'll add that as a feature request to the H9 wish list though, and next time we go through that list we'll talk about how hard it would be to deglitch that parameter and expose it via MIDI.

Any news on making the output level adjustable via MIDI CC?

I really don't need continuous control, but like like to assign a CC number so I can use it like a volume boost.