Basically registered an account here just to say this. I don't own the Polybrute, but I'm really eyeing it at the moment. I'm going to buy the Expressive E Osmose when it comes out, and I really want an analog synth that can be controlled by it. It would be really intresting to hear someone from Auturia comment on if this even is theoretical possible with the Polybrute.
Just a question: Would it, even in theory, be possible to get polyphonic aftertouch on the Polybrute from the internal keyboard, or is aftertouch somehow global in the hardware itself? If you hook up the Polybrute as a midi controller, do you get individual aftertouch from each key separately?