M-Audio AXIOM 61 Advanced 61-Key Semi-Weighted USB MIDI Controller 9900-51413-10 61-key velocity-sensitive semiweighted action keyboard with assignable aftertouch 8 MIDI-assignable trigger pads 15 assignable buttons, including 6 transport buttons Compatible with free Enigma librarian/editor for storing and organizing setups Includes Ableton Live Lite 4 music production softwareso you can make music right away