KeyRig 49 - Easy-to-Use 49-Note USB Keyboard! The M-Audio KeyRig 49 turns your Mac or PC into a versatile keyboard workstation. Featuring a 49-key, synth-action USB MIDI keyboard and the award-winning Key Rig software for the PC, KeyRig 49 makes it easy to start composing and performing music with a computer. Use KeyRig 49 to play Key Rig's virtual instrument sounds, or audition loops and compose songs with M-Audio's Session, Apple's GarageBand, Ableton's Live Lite (included) or other music-creation programs. The KeyRig 49 keyboard also includes professional features like pitch and mod wheels, an assignable volume slider, octave +/- buttons and sustain pedal input. It's powered via a single USB cable and works instantly with computers running Mac OS X or Windows XP.