Denon AVR-2312CI Protocol Manual page 37

EVENT PARAMETER
PV CN **
BR **
CM **
HUE **
function
CONTRAST change
BRIGHTNESS Change
CROMA LEVEL change
Hue Change
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example
PVCN 50<CR>
PVBR 12<CR>
PVCM 50<CR>
PVHUE 50<CR>