1) Keyboard instrument
Found on
https://www.crosswordclues.com/clue/chordboard
The chordboard is an electronic musical instrument based on software technology, and played by keyboard controller, one implementation being a set of four MIDI keyboards arranged vertically. The patent for this musical technology specifically identifies the seven chords that exist for each key signature, and how these key signatures can be selecte...
Found on
http://en.wikipedia.org/wiki/Chordboard
No exact match found.
