Prodipe 49C Midi USB Keyboard Controller | #466061638
Arduino-Hacking a Cheap Midi Controller Keyboard, part 1 - Pieces of Pi
Prodipe Midi Usb Keyboard Controller 49C Brand New ! | #485934107
Amazon.com: Akai Professional MPK249 | 49-Key USB MIDI Keyboard & Drum Pad Controller with LCD Screen (16 Pads / 8 Knobs / 8 Faders), VIP Software Download Included with 4-Port USB Hub