Patent Document ID: 4203345
Application ID: 05871973
Patent Flag: 1

Claim One:
1. An automatic visual music teaching device for displaying the exact structure of coded musical chords or scales snd permitting finger placement on a visual keyboard, said device comprising a first group of actuable switches for selecting a desired major and minor coded chord to be visually displayed, circuit means associated with said switches for providing binary signals indicative of said desired coded chord or scale, a decoding circuit for decoding said signals and providing a coded message signal, said coded message signal constituting an output address line signal which activates predetermined memory circuits of a memory system, said memory circuits feeding coded signals to matrix decoders to select proper x-y lines in said matrix, and display means having a plurality of light sources each associated with an intersecting x-y line of said matrix to visually indicate a composite part associated with one of said actuable switches representative of said desired coded chord, said display means further having a keyboard having visual coded markings thereon corresponding to the structure of all coded markings on particular ones of said actuable switch means representing the selected coded chord and modification thereof, each light source being associated with each said visual coded markings whereby to indicate the position of said composite parts of said coded chord in association with said keyboard; a second group of actuable switches representative of individual tensions of a selected chord of said first group of switches for altering, by augmenting or diminishing the said selected chord, the structure of said selected chord to display a modified selected chord; a third group of switches representative of the fundamental and three inversions of said selected chord to select the position of said selected chord on the keyboard and while maintaining the structure of said selected chord, said second and third group of switches also having circuit means to provide coded message signals to said memory circuit.