LEDs can be controlled by sending MIDI Notes through USB Port 1 to the QuNexus. Notes 48 (C2) - 72(C4) will control the keyboard LEDs. If you send notes outside of that range they will wrap around and still control the LEDs of the Keyboard. MIDI Input cannot currently control the Left Side Buttons. Channel 1 is used as the LED Input channel in our Factory Presets (with exception to Preset D, which uses Channel 9) but the Channel number is editable using the QuNexus Editor. See the LED Mode chapter of the QuNeuxs Manual for more information on how to edit the Channel number in the Editor.