Electronic device of a type in which musical tones are produced

Details Electronic device of a type in which musical tones are produced Electronic device of a type in which musical tones are produced

1988-10-11

1990-01-23

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84454, 84DIG18, 324 79D, G01R 2302, G10H 144, G10H 318

Patent

active

048950602

ABSTRACT:
A musical tone generating device generates musical tones of a frequency in accordance with pitches which are extracted from input waveform signals by a pitch extracting means. When a pitch extracted by the pitch extracting means varies within a range of a predetermined musical interval difference, an average of the currently extracted pitch and the previously extracted pitch is calculated and the frequency of the musical tone is defined on the basis of the calculated average which serves as a current pitch. On the other hand, when the currently extracted pitch exceeds the above-mentioned range, the frequency of the musical tone is defined on the basis of the currently extracted pitch. In this manner, an undesirable influence to the sound frequency caused by any unnecessary variations or fluctuations in the pitch is decreased or eliminated, thereby enabling producing of a steady sound frequency. In addition, when the pitch is intentionally altered, the frequency of the musical tone is instantly changed in response to the pitch alteration.

REFERENCES:
patent: 4117757 (1978-10-01), Akamatu
patent: 4151775 (1979-05-01), Merriman
patent: 4217808 (1980-08-01), Slepian et al.
patent: 4351216 (1982-09-01), Hamm
patent: 4377961 (1983-03-01), Bode
patent: 4429609 (1984-02-01), Warrender
patent: 4606255 (1986-09-01), Hayashi et al.
patent: 4627323 (1986-12-01), Gold
patent: 4633748 (1987-01-01), Takashima et al.
patent: 4665790 (1987-05-01), Rothschild
patent: 4688464 (1987-08-01), Gibson et al.

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