owner's manual (PDF) - Kawai

On page three of the MIDI Settings menu, you can determine which MIDI channels the CP will
receive MIDI data on. The CP can receive MIDI data on all 16 MIDI channels at once or only certain
MIDI channels.
Channel Receive On/Off
Each of the 16 MIDI channels can be set separately to On or Off.
L 1
L 2
L 3
R 1
R 2
R 3
Use the L2, R2, L4 and R4 buttons to select the channel
and use the Dial to change the setting, On and Off.
L 4
R 4
L 5
R 5
F 1 F 2 F 3 F 4 F 5 F 6 F 7
F1-F4
Selects the other MIDI Settings pages.
System Menu P. 141