M-Audio AXIOM 49 Advanced 49-Key Semi-Weighted USB MIDI Controller (OLD MODEL) 49-key velocity-sensitive semi-weighted action keyboard with assignable aftertouch 8 MIDI-assignable trigger pads Compatible with free Enigma librarian/editor for storing and organizing setups Controller Mute function mutes controller output to avoid parameter jumps Includes Ableton Live Lite 4 music production softwareso you can make music right away