Chord display device for fretted string instrument

Abstract

A device to display musical chords and notes for fretted string instruments comprising (a) top sheet having a plurality of transparent patterns representing the strings and frets on the fingerboard of the instrument, (b) pivot located at a central point on the sheet, and (c) underlying rotatable disk having a plurality of patterns of spots representing different types of chords. All the fingerboard patterns on the top sheet are identical but each is disposed to display chords in a different musical key. When the rotatable disk is angularly indexed relative to the top sheet, the device displays a plurality of musical chords, differing in position on the fingerboard, in musical key and in chord type. The spots displayed through the transparent fingerboard patterns indicate where the fingers may be placed on the strings and which strings may be left unstopped when a chord is sounded.

Dependencies are inferred from the claim text.