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GPIO multiple key press

Hi all.

I have a DMX 6ch relay box connected to 6 GPIO inputs on my HD120. I am trying to trigger 30 different sound files using multiple key presses. ( if key 1 + 4 + 5 is pressed play file number 25, like in binary code)

Does anyone know if this is possible? Is there any logical functions like AND / OR available?

The setup:
I have an active speaker in the ceiling connected directly to my HD120. There are also some lamps controlled by wireless DMX. I would like to control the sound files with the wireless DMX signal as well.

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