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Amazon.com: M-Audio Oxygen 61 (MKV) – 61 Key USB MIDI Keyboard Controller With Beat Pads, Smart Chord & Scale Modes, Arpeggiator and Software Suite Included : Everything Else
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MIDI Controller Set - 61 Keys USB MIDI Keyboard Controller with Beat Pad, Sustain Pedal and Software Suite Oxygen 61 MKV and SP-2 - Newegg.com
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Amazon.com: Oxygen 61 MK IV - 61-Key USB MIDI Drum Pad and Keyboard Controller : Musical Instruments
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