Electronic stereo reverberation device with doubler

Details Electronic stereo reverberation device with doubler Electronic stereo reverberation device with doubler

1982-09-20

1984-12-18

George, Keith E.

Electrical audio signal processing systems and devices

Sound effects

Reverberators

381 17, H03G 300

Patent

active

044894392

ABSTRACT:
A stereo or two channel electronic reverberation device is disclosed comprising an analog delay device which receives audio signals and provides delayed output signals at a plurality of outputs, with the time delay period of each output being different from the delay period of other outputs. Two summing devices each receive inputs from different combinations of the analog delay device outputs to provide two different signals having different reverb components. An additional output delay device is also provided with receives the last output from the analog delay device, delays this signal a time period substantially greater than the time period between any two adjacent analog delay device outputs, and provides this substantially greater delayed signal to only one of said summing devices. The circuit includes a synthetic doubler which provides an output cyclicly varying in pitch from its input. Two output mixers provide reverb alone, doubler signal alone or both reverb and doubling. A timed turn on gate at the input of the analog delay device substantially eliminates unwanted noise signals of short duration.

REFERENCES:
patent: 3126449 (1964-03-01), Shirman
patent: 3749837 (1973-07-01), Doughty
patent: 3881057 (1975-04-01), Adachi et al.
patent: 4164884 (1979-08-01), Kakghashi
patent: 4184047 (1980-01-01), Langford
patent: 4215242 (1980-07-01), Gross
patent: 4268717 (1981-05-01), Moore

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