Possible project – more advanced sustain pedal

So, I’m pondering making a more advanced sustain pedal controller for my two keyboards.

In particular, I’d like to implement the following features:

1) Latching and momentary control for the novation
2) sustain of both keyboards with one pedal

What I’m thinking of doing is looking for a three pedal input device, and modifying it so that

A: pressing the center pedal applies sustain to both keybaords
B: pressing the center pedal along with the left or right pedals applies or clears a latching state

I am thinking of using a microcontroller and two relays – obviously this could be done with straight logic but using a microcontroller allows debouncing and also possibly adding additional features later.

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