To set the MIDI channel for your CMK keyboard:
1) Hold the first piston from the left (SET)
2) Momentarily press the first black key from the left (C#1)
3)While still holding SET, momentarily press one or more of the first 16 white keys from the left (C1 to D3). Each white key will correspond to a MIDI channel (i.e C1 = Channel 1 and D3 = Channel 16).
4) Afterwards, release the SET piston.
Note: You can set each manual to send on multiple MIDI channels. Each white key you press in this process will activate MIDI traffic on the channels those keys represent.