These programs aims to emulate the Rock Band Keyboard and Mustang Pro Guitar's native MIDI mode using the USB interface so that they may be used wirelessly and without a MIDI cable. Reddit page that lead to this.

Older versions:

• Rock Band 3 PS3/Wii Keyboard USB to MIDI Software (RB3KB-USB2MIDI)
• Rock Band 3 PS3/Wii Keyboard USB to Phase Shift Keyboard (RB3KB-USB2PSKB) (Currently not implemented at all)
• Rock Band 3 PS3/Wii Mustang Guitar USB to MIDI Software (RB3M-USB2MIDI)

Download test version from: http://jasonharley2o.com/projects/rb3usb/

If you want to preview the code: https://github.com/Jas2o/RB3-USB

• Windows with .NET 4.6.1 Framework,
• A virtual MIDI device, e.g. loopMIDI (or you can test it with Microsoft GS Wavetable Synth that's already available on Windows).
• The LibUsbDotNet filter driver is only needed for PS3 Keyboard and Mustang controllers.

• Phase Shift Keyboard
• Stopping MIDI/USB/HID properly when closing the GUI (will need to close the console window for now).
• Some MIDI functions (Pitch Bend/Modulation) are completely broken.

• Using HidLibrary for Wii controllers.
• Using NAudio instead of midi-dot-net.