Digital chord generation for electronic musical instruments

Details Digital chord generation for electronic musical instruments Digital chord generation for electronic musical instruments

1977-09-19

1980-02-05

Weldon, Ulysses

Music

Instruments

84 103, 84 117, 84 124, 84DIG22, G10H 100

Patent

active

041866363

ABSTRACT:
An electrical musical instrument having a digital circuit which automatically generates selected chordally related tone signals in response to manual selection of a root note. A root encoder provides a binary code representative of the root note in response to note selections, and an interval code generator automatically provides code signals having binary number values equal to the number of half steps from the root for a given interval. An adder arithmetically adds the root code and the interval code to generate a code for a chordally related note having both octave and note information corresponding to the automatically generated tone signal. In one mode of operation, the root code represents the root of the root-fifth pair of highest priority around the circle of fifths selected on a manual keyboard. In another mode, the root code is representative of a note selected on the pedal clavier.

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