A list of verified keyboards you can use in Rock Band 3 in RPCS3.
Picture Name Platform Compatibility Configuration
Rock Band MIDI Pro Adapter PlayStation 3 Rock Band MIDI Pro Adapter PlayStation 3 Great Compatibility Symbol [CLICK HERE]
PlayStation 3 Rock Band Wireless Keyboard with dongle Rock Band Wireless Keyboard (with dongle) PlayStation 3 Great Compatibility Symbol [CLICK HERE]
MIDI Keyboard MIDI Keyboard MIDI Great Compatibility Symbol [CLICK HERE]
Santroller Powered Keyboards Santroller Powered Keyboards Santroller Great Compatibility Symbol [CLICK HERE]
PlayStation 3 Rock Band Wireless Keyboard without dongle Rock Band Wireless Keyboard (without dongle) PlayStation 3 Okay Compatibility Symbol [CLICK HERE]
Xbox 360 Rock Band Wireless Keyboard Rock Band Wireless Keyboard Xbox 360 Okay Compatibility Symbol [CLICK HERE]
PlayStation 3 Rock Band Wireless Keyboard Rock Band Wireless Keyboard Nintendo Wii Okay Compatibility Symbol [CLICK HERE]