Electronic musical instrument with means for automatically gener

Details Electronic musical instrument with means for automatically gener Electronic musical instrument with means for automatically gener

1975-08-26

1979-04-10

Jackmon, Edith S.

Music

Instruments

84 124, 84DIG12, 84DIG22, G10F 100, G10H 102

Patent

active

041482417

ABSTRACT:
An electronic musical instrument incorporates a single integrated circuit chip for performing a variety of logical operations for the production of chords and various accompaniment signals automatically, in response to depression of one or two keys within a related portion of the keyboard of the instrument. A multiplexer is employed, in association with the keyboard, to produce a train of signals in response to depression of one or more keys, and one or more function control switches; certain ones of these signals are used to address a plurality of read only memory devices for the generation of the several components needed for the mode of operation which is selected. In an automatic chord mode, a chord is selected automatically, corresponding to an operated key of the keyboard. The chord components include the root, the third (which may be selectively minored), the fifth, the sixth and the seventh (which can be selected or not). The several chord components are mixed in a stair step network for one output signal, amd may selectively be produced individually for an arpeggio or a strum or both.

REFERENCES:
patent: 3548066 (1970-12-01), Freeman
patent: 3743755 (1973-07-01), Watson
patent: 3789718 (1974-02-01), Bunger
patent: 3929051 (1975-12-01), Moore
patent: 4019417 (1977-04-01), Carlson

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