xbeefsupreme writes with news that Harmonix has officially demonstrated Rock Band 3's 25-key MIDI keyboard. From USA Today: "During the game, green, red, blue, yellow or orange keys flow on a 'stream' representing the notes to be played on five corresponding keyboard keys. In a new authentic Pro mode meant to help players segue to actual instruments, all 25 keys are used; the streams shifts left and right to cover the correct keys. The keyboard also works as a MIDI keyboard that can be connected to a computer. 'This is a real instrument and a real device,' says senior designer Sylvain Dubrofsky." The game will also support more advanced "real" guitar controllers, which have six actual strings you can strum. Hit the link below to see the keyboard in use.