Voltage controlled type electronic musical instrument

Details Voltage controlled type electronic musical instrument Voltage controlled type electronic musical instrument

1975-02-25

1976-09-07

Witkowski, Stanley J.

Music

Instruments

84 11, 84 112, 84 124, 84 127, 84DIG9, G10H 100, G10H 502

Patent

active

039787540

ABSTRACT:
This invention provides an electronic musical instrument comprising a keyboard circuit for producing a pitch determining voltage signal representing the note of an operated key, a voltage controlled oscillator for producing a tone signal having a tone pitch determined by the pitch determining voltage signal, and a voltage controlled lowpass filter for imparting a desired tone color to the tone signal. The voltage controlled lowpass filter is responsive to the pitch determining voltage signal from the keyboard circuit to control the cutoff frequency of the voltage controlled lowpass filter in such a manner that the harmonic content of a higher tone signal is decreased from that of a lower tone signal.

REFERENCES:
patent: 3288904 (1966-11-01), George
patent: 3316341 (1967-04-01), Peterson
patent: 3614288 (1971-10-01), Amano
patent: 3821461 (1974-06-01), Mieda
patent: 3828110 (1974-08-01), Colin
patent: 3881387 (1975-05-01), Kawakami
patent: 3886834 (1975-05-01), Okamoto
patent: 3886836 (1975-06-01), Hiyoshi
patent: 3897709 (1975-08-01), Hiyoshi et al.
patent: 3902392 (1975-09-01), Nagahama
patent: 3902396 (1975-09-01), Hiyoshi

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