Sound system control

Details Sound system control Sound system control

1978-06-22

1980-06-03

Mullins, James B.

Amplifiers

Signal feedback

Phase shift means in loop path

330109, 330126, 330303, H03F 134

Patent

active

042064171

ABSTRACT:
A parametric audio equalizer has linear frequency response controls for bass, middle and treble frequency ranges arranged in a line according to the frequency ranges, and linear amplitude controls arranged perpendicularly to the corresponding frequency response selection controls, with a bandwidth selector for the middle range located below the middle range amplitude control. Simple graphic indicia of frequency responses appear near the corresponding controls. A summing circuit combines the input signal with signals on + and - inputs coupled to a variable Q and frequency bandpass filter.

REFERENCES:
patent: 3602833 (1971-08-01), Barnette
patent: 4107622 (1978-08-01), Toyomaki

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