Akai MPD16 USB MIDI Pad Control Unit Connects to computers via USB and/or MIDI Connects to such sound engines as the Akai Z4 and Z8 samplers 16 MPC-spec pressure- and velocity-sensitive pads generate Note-On with velocity when tapped Full-Level mode produces data with a velocity value of 127 regardless of how hard it is tapped A 16-Level mode allows you to generate note velocities in 16 steps with the 16 pads