Hi, I've come across a unit of the "M-audio iControl for Garageband" MIDI-controller. It's an oldie, probably, but would suit me fine as a general controller for volumes and shortcuts.
https://www.soundonsound.com/reviews/m-audio-icontrol
In this review I found, it specifically states that it may not play well with anything other than GarageBand. But I assume that's regarding use out of the box, and not DIY like MIDI-mixer would be.
Will this device work with MIDI-mixer, you guys think?