Variable filter circuit, especially for synthesizing and shaping

Details Variable filter circuit, especially for synthesizing and shaping Variable filter circuit, especially for synthesizing and shaping

1976-05-21

1978-08-15

Witkowski, Stanley J.

Music

Instruments

84 125, 84DIG9, 84DIG10, 84DIG19, 328167, 330100, 330103, G10H 104, G10H 500

Patent

active

041063848

ABSTRACT:
A variable filter circuit, especially for synthesizing and shaping tone signals, in which a variable light source is provided which influences light sensitive resistor elements in the filter circuit. The variable circuit, by the use of selector switches, can provide different musical features, such as muted voices, percussion, brass, woodwind and the like, all of which will enhance, for example, existing organ voicing while it is, furthermore, possible to obtain the effect of playing a solo instrument together with organ voicing.

REFERENCES:
patent: 3911776 (1975-10-01), Beigel
patent: 3919648 (1975-11-01), Uetrecht
patent: 3973223 (1976-08-01), Uchiyama

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