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Amazon.com: M-Audio Oxygen 49 (MKV) – 49 Key USB MIDI Keyboard Controller With Beat Pads, Smart Chord & Scale Modes, Arpeggiator and Software Suite Included : Musical Instruments
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Amazon.com: M-Audio Oxygen 25 IV | USB Keyboard and Pad MIDI Controller Featuring Pad/Velocity - Sensitive Keys : Everything Else
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