M-Audio Axiom 49, 49-key velocity-sensitive semi-weighted action keyboard with assignable aftertouch, 8 trigger pads, 8 rotary encoders, 9 sliders, 15 buttons (including 6 reassignable transport buttons), 15 function buttons and backlit LCD screen for total front-panel programming, built-in USB bus-powered MIDI interface including standard MIDI In and Out jacks, 20 non-volatile memory locations; compatible with free Enigma librarian/editor software