Nick Monk (Snowsh) created a monster PCB known simply as “The Machine.” The Teensy 4.1-based behemoth is a generative synth with additional capabilities via expansion modules.
A combination of WS2812 RGB LEDs and OLED displays form the UI, with copious potentiometers and buttons providing the interface. While not much more detail is known about the impressive device, the below video and associated playlist give an idea of its capabilities.