The Korg DVP-1 is a bad-ass, underrated voice mangler with MIDI control that is really unique in its class – I’ve gotten some bonkers sounds out of this thing and vocalists love working with it because using the front-panel knobs or an attached MIDI controller they can have real-time control of all the pitch and vocoder effects their voice is going through. I hate to see this go honestly but I don’t have any vocalists in my life right now, so off to a better home. 2 rack units tall.
Manual here: https://www.korg.com/us/support/download/manual/1/361/3734/