The MM16 is a multi-purpose MIDI data processor with 17 front panel faders. Each of the sliders can be assigned for continuous controller information over any one of 16 MIDI channels, a "velocity mode" that uses the 16 sliders to become a "graphic EQ" for velocity data, and a system exclusive mode for transmitting system exclusive information to control individual synthesizer functions. Setups are included for Kawai K1, K4, K5, Yamaha DX7, and Roland D50. The MM16 can merge two MIDI signals, and can perform MIDI channelizing. You can also use it as a control surface for DAWs such as Pro Tools or especially with Sonar’s ACT (Active Controller Technology). This particular unit is in perfect as-new condition. Works perfectly and clean as a whistle from my smoke-free studio. I am the original owner and I never used it. Comes with power supply and manual. $129. Contact me for high res picture at soundrecordingadvice-dot-com.