Recreating Session Box LED Functionality For 2023 APC Series

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Hey all,

Relatively new CSS user here. I’m trying to recreate the stock LED colors & trigger states of the APC Key 25 mk2’s clip matrix in a script, so that I can then add some more advanced functionality to it.

On the APC the physical MIDI input occurs on channel 0, but messages dictating the specific levels of brightness, as well as specific tempos of pulsing and blinking states, occur on other channels. The CSS Session Box mapping type, while helpful to an extent, only allows for sending feedback on the physical input’s MIDI channel, and that single outcome is static color feedback on the pads at about 10-25% brightness. 😛