Music – Accessories – Teaching devices
Patent
1986-08-20
1988-08-16
Perkey, W. B.
Music
Accessories
Teaching devices
G10B 1500
Patent
active
047635584
ABSTRACT:
A method and apparatus for exhaustively determining the chord note positions for selected chord types for a stringed instrument determine for each chord type and each allowable combination of at least three fret positions, all allowable valid combinations of chord note positions for playing the chord. The method and apparatus then graphically output for each chord type and each allowable combination of fret positions the allowable combinations of chord note positions. The method provides for graphically representing, on a single grid, a plurality of positions for playing a selected chord on a stringed instrument. The method uses a substantially orthogonal coordinate system to represent string location on a first axis and fret position on a second axis. Each valid string-fret position intersection corresponding to a note of the chord is graphically portrayed on the grid at the intersection. The exhaustive representation of grids, representing different chords and different fret positions, is presented in a regular array wherein the chords are indexed along a first axial direction and the fret locations are indexed along a second axial direction.
REFERENCES:
patent: 4295406 (1981-10-01), Smith
patent: 4412473 (1983-11-01), Laflamme
patent: 4559861 (1985-12-01), Patty et al.
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