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Amazon.com: Vangoa MIDI Keyboard Controller 25 Keys, Worlde Panda MINI USB Midi Keyboard with Drum Pads, Beat Maker Machine Pad, Black : Everything Else
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Amazon.com: Alesis VI61 | 61-Key USB MIDI Keyboard Controller with 16 Pads, 16 Assignable Knobs & RockJam Xfinity Heavy-Duty, Double-X, Pre-Assembled, Infinitely Adjustable Piano Keyboard Stand : Musical Instruments
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The MIDI Standard: Introduction to MIDI and Computer Music: Center for Electronic and Computer Music: Jacobs School of Music
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