This program aims to emulate the Rock Band Keyboard's native MIDI mode using the USB interface so that it may be used wirelessly and without a MIDI cable. Reddit page that lead to this.

Downloads and source code at: http://jasonharley2o.com/projects/rb3usb/keyboard/

See also:

• RB3M-USB2MIDI for this program adjusted for Mustang guitar.
• RB3KB-USB2PSKB for translating RB Keyboard to (PC) keyboard for Phase Shift.

• Windows with .NET 4.5 Framework,
• LibUSB filter driver, e.g. wizard from LibUsbDotNet,
• A virtual MIDI device, e.g. loopMIDI.

If you want to compile it yourself you'll need LibUsbDotNet and midi-dot-net - the packages on NuGet will do.

Install the LibUSB filter driver on your keyboard, keep in mind this is per USB port.

• PS3: “vid: 12ba pid:2330”
• Wii: “vid: 1bad pid:3330”

With a virtual MIDI device program running, run RB3KB-USB2MIDI, select your virtual device and click “Doing Nothing” to run.

• All 25 keys with velocity (although the implementation may be incorrect).
• Changing octave/program using the top four buttons, or from the GUI.
• All Notes Off panic (Select/Home/Start together).
• Slider touch strip controlling Modulation and Pitch Bend (with overdrive button held down).
• LED animations (may break PS3 keyboards).
• Drum map the left 12 keys by pressing Up on the D-Pad, or from the GUI.
• Pedal for Sustain

• Press Down on the D-Pad to swap Modulation/Pitch Bend, or from the GUI.
• Press Left to reset Pitch Bend.
• Press Right to reset Modulation.
• Option to ignore the keyboard's 0 value for Modulation and Pitch Bend (i.e. disables the auto-reset).

• The other pedal modes (expression and volume), the RB1 pedal does not work for these so I can't test what the raw data looks like.
• The Select/Home/Start buttons being able to control some programs.

• Toggling Drum Mapping from the GUI won't change the LED even with Animations enabled.
• The program will randomly crash when the keyboard is turned off or asleep (unconfirmed).
• Changing octave/program using the GUI is unreliable.
• Not really a bug, but RB3M-USB2MIDI is a separate program for the Mustang Pro Guitar, and doesn't support MIDI-Pro Adapter for either Keyboard or Guitar (but something I could do).