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by Fannon 17 days ago
If I needed something like this, my first try would be to take a MIDI / DAW controller like Novation Launchpad Mini Mk3 and write a script for it.

This would be cheaper, much more versatile and customizable I bet. Many MIDI / DAW controllers can be "programmed" via MIDI IN/OUT, e.g. how to light the pads.