The Xboard 61 USB/MIDI Controller for PC and Mac operating systems features 61 premium full-size keys with aftertouch, 16 programmable real-time control knobs, 16 new patch select/program change buttons, Xboard Control editing software, and a full version of E-MUs Proteus X Version 1.5 Desktop Sound Module with over 2GB of sounds, including a new custom bank of E-MUs finest performance keyboard sounds.