Another thing I really love about that video is that he’s demonstrating this powerful minimalistic synth using the amazing Rock Band 3 keyboard. I bought a couple of those five years ago when they were abundant and inexpensive, and my son worked out how it sends control codes to a computer over the wireless interface. He had a translator to turn the codes into MIDI. I still have one of those keyboards in my wardrobe. It might be fun to get it running as a controller for Bela using my son’s software.
Later: here’s a thread with a link to that software.