Is there a full hardware soundboard controller for logic?
There are hardware controllers for Logic, yes.
I mean it looks like a live mixer with knobs for eq, gain, and aux except it controls logic. What are the hardware controllers?
OK, what you're looking for is called a (MIDI) Control surface.
There are LOTS of those, although they have no fixed assignments to their controls: they are all programmable (which is the whole point of it).
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