A Pimoroni Speaker Phat mounted on a Raspberry Pi 2. It has been extended with a 1602 liquid crystal character display and a rotary encoder knob. Blue and yellow wires have been soldered to the shared 40-pin heart of the Phat to connect the display and encoder to the Raspberry Pi. Red and black wire emerge from under the extended Phat to a small membrane speaker. An Akai LPK25 MIDI keyboard is plugged into one of the USB ports. The display reads: "Voice TG1 <8=PIANO 1>"
https://cdn.fosstodon.org/media_attachments/files/111/324/242/315/897/410/original/2f380ca15ea1cc59.jpg