Hi there!
Did you check that both H9s are set to receive on the appropriate MIDI channel? I don’t know if that was mentioned in the directions for the DMC-4 Gen2.
My Disaster Area controller (DPC-8EZ) is hard-programmed to output on a particular channel. If that’s true for your DMC-4 Gen2, then it should say somewhere in the manual.
Either way, setting the MIDI Channel to ‘omni’ might produce some sort of response, even if it’s not what you want (my DPC-8EZ outputs additional messages on another channel that confuse the H9 when set to ‘omni’).
You can check/set the MIDI channel in the H9 Control app under Pedal/MIDI Settings/MIDI Channel. Possible settings are “off”, “omni”, or channel 1 – 16.
Good luck!
