Electronic musical instrument of numerical value processing type

Details Electronic musical instrument of numerical value processing type Electronic musical instrument of numerical value processing type

1978-02-22

1980-02-26

Witkowski, S. J.

Music

Instruments

G10H 104, G10H 500

Patent

active

041899725

ABSTRACT:
In an electronic musical instrument of a numerical value processing type, an operation of a key causes the generation of a numerical value corresponding to the operated key and a tone having a frequency determined by the numerical value is produced. A vibrato effect is obtained by periodic modification of the value. The instrument comprises a circuit which generates a periodic signal having a portion in which the amplitude of the periodic signal increases at a predetermined rate, and a succeeding portion having a constant amplitude, and a circuit for varying the rate. The rate varying circuit sets the rate to be either a low rate that can be discriminated by human ears or a high rate that can not be discriminated by human ears.

REFERENCES:
patent: 3951030 (1976-04-01), Deutsch
patent: 3952623 (1976-04-01), Deutsch
patent: 4026180 (1977-05-01), Tomisawa et al.
patent: 4083284 (1978-04-01), Nakada
patent: 4086838 (1978-05-01), Kawamura

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