In BIAB (not RB) there is menu item for "MIDI Chord Detection" which brings up a window titled "Play Chord on MIDI keyboard". The user can then play a chord on their keyboard, and the window updates 4 edit fields with the most likely spelling of the chord played. The user can then use their computer keyboard and "ctrl-Enter" the top-most field back into the Chords window, or click one of four window buttons to have the corresponding chord entered into the Chords window.

It would be useful if this window were also available in RB.