Phase shifting sound effects circuit

Details Phase shifting sound effects circuit Phase shifting sound effects circuit

1976-06-25

1978-08-22

Rubinson, Gene Z.

Music

Instruments

G10H 102

Patent

active

041080416

ABSTRACT:
A sound effect circuit with a phase shifter producing a signal shifted in phase with respect to an input signal, a combining circuit for arithmetically combining the input and phase shifted signals to produce an output signal, an oscillator for periodically modulating a characteristic frequency of the phase shifter and a modulation control circuit. The modulation control circuit causes the modulation rate to gradually increase when modulation is manually switched on and to gradually decrease when modulation is switched off. The modulation control also causes the characteristic frequency to vary inversely with the modulation rate. The system defined by a part of the circuit producing a first output signal proportional to the sum of the input and phase shifted signals has a comb shaped frequency response curve and a part of the circuit producing a second output signal proportional to the difference between the input and phase shifted signals has a comb shaped frequency response curve inversely related to that of the summing part of the circuit. When the two output signals are fed to separate speakers, the total frequency response curve of the two systems taken together is substantially flat, but the distribution of energy in the frequency spectrum moves in space as the modulation proceeds to produce a new "stereo phase shift" sound effect. A rotary potentiometer for mixing the first and second outputs signals with each of the input signal and the phase shifted signal in selected proportion provides a third output signal with selectively variable characteristics.

REFERENCES:
patent: 3007361 (1961-11-01), Wayne, Jr.
patent: 3609205 (1971-09-01), Schwartz
patent: 3644657 (1972-02-01), Miller
patent: 3737555 (1973-06-01), Mathias
patent: 3749837 (1973-07-01), Doughtt
patent: 3795756 (1974-03-01), Suzuri
patent: 3833752 (1974-09-01), Vanderkooh
patent: 3866505 (1975-02-01), Adachi
patent: 3979991 (1976-09-01), Kawamoto
patent: 4000676 (1977-01-01), Love

Affiliated with

Also associated with

Rating

Phase shifting sound effects circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase shifting sound effects circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase shifting sound effects circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1550554