Sound Study MIDI 2 CV DIY PCB and Panel, Console Version
Amazon.com: USB MIDI Keyboard Controller MINI 32-Key, Donner N-32 with Screen, Sequencer, Chord, Bend Sound Effects By Light-up Joystick for Mac/PC, Music Production Software, 40 Free Courses : Musical Instruments
The MIDI Standard: Introduction to MIDI and Computer Music: Center for Electronic and Computer Music: Jacobs School of Music