Electronic musical instrument

Details Electronic musical instrument Electronic musical instrument

1978-06-09

1979-10-09

Witkowski, Stanley J.

Music

Instruments

84DIG8, 84DIG20, G10H 506, G10H 510

Patent

active

041701607

ABSTRACT:
An electronic musical instrument includes a linear voltage divider network including a plurality of equal series resistance elements for generating a first output voltage as a function of the state of a plurality of tone select keys. This first voltage is converted to a second voltage which selectively varies exponentially as a function of the selected tone. The second voltage is compared with a ramp generator output to set and reset a latch which generates an audio frequency signal thereby. The audio frequency signal is coupled to an octave generator controlled by octave select keys for outputting the tone in a selected octave for output as sound via a speaker. Sharp and flat keys are also provided to cause the first voltage to vary in a way which emulates the functioning of a standard keyboard.

REFERENCES:
patent: 3598892 (1971-08-01), Yamashita
patent: 3806623 (1974-04-01), Yamada
patent: 3828108 (1974-08-01), Thompson
patent: 3872764 (1975-03-01), Munch, Jr. et al.
patent: 3880039 (1975-04-01), Studer
patent: 3906830 (1975-09-01), Mathias
patent: 3948137 (1976-04-01), Niinomi
patent: 3949639 (1976-04-01), Adachi
patent: 3991645 (1976-11-01), Luce et al.
patent: 4077293 (1978-03-01), Uchiyama
patent: 4136595 (1979-01-01), Gillette

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