Available in 25-, 49- and 61-key models, the redesigned M-Audio Oxygen USB MIDI keyboard controllers feature full-size, Velocity-sensitive keys along with sliders, knobs, buttons for controlling and performing with software instruments.

In addition to 25 velocity-sensitive keys, the Oxygen 25 ($149.95 MSRP) has 8 MIDI-assignable knobs, 6 dedicated transport controls, a MIDI-assignable slider, dedicated track up / down buttons, 4 velocity curves and 3 fixed velocity settings, a sustain pedal input, and DAW auto-mapping via DirectLink mode. With DirectLink, controls are mapped instantly to a DAW's mixer, pan, and transport functions, providing real-time control. Each controller's factory presets map to such music software as Xpand!2, Hybrid, Velvet, Strike, Oddity, ImpOSCar, and Minimonsta.

Likewise, the Oxygen 49 ($189.95 MSRP) has nearly the same features as the Oxygen 25, except that it has 49 Velocity-sensitive keys instead of 25, and 9 MIDI-assignable sliders instead of 1. The Oxygen 61 ($249.95 MSRP) is the same as the Oxygen 49, but with 61 Velocity-sensitive keys instead of 49.

All of the Oxygen controllers are USB bus-powered and are class-compliant with Windows XP, Windows Vista, and Mac OS X.