Abstract
Separate areas of a display board are selectively activated either separately or in various combinations to illustrate a chord diagram, a fingerboard diagram, and/or a musical staff diagram. Lamps in each of the three diagrams are illuminated responsive to the playing of a specially constructed stringed instrument by the instructor to illustrate finger positions in the case of the chord diagram and the fingerboard diagram, and to illustrate musical position of the notes played on the scale diagram. One or more lock-in switches cause the activated lamps to remain lighted after the strings of the musical instrument are released by the instructor. Finally a digital readout lamp associated with each string on the chord diagram illustrates the finger which should be used to depress the corresponding string at the location indicated by the lamp.
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