Electronic audio signal processor

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United States of America Patent

PATENT NO 4584700
SERIAL NO

06420280

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Abstract

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An electronic audio signal processor especially suitable for electrical instruments such as electric guitars is provided including a controlled distortion and tone alteration portion and a reverb portion. The controlled distortion and tone alternation portion in one form comprises in cascade a compression stage which compresses the amplitude level of an inputted audio signal, a mid band pass filter, a distortion amplifier for adding controlled distortion to said signal and a complex filter having a roll-off of increased attenuation with increased frequency range in the lower and upper audio frequency ranges, and a generally flat response in the middle audio frequency range except with a dip followed by a peak in the upper portion of the mid audio frequency range. The reverb circuit includes a synthetic doubler which provides an output cyclicly varying in pitch from its input and a stereo analog shift register reverb device having two summers which combine staggered adjacent output lines from an analog shift register in different combinations. Two output mixers in conjunction with a switch provide reverb alone, doubling alone or reverb with doubling.

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Patent Owner(s)

Patent OwnerAddress
SR&D INCWALTHAM MA

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Scholz, Donald T 13 Rich Valley Rd., Wayland, MA 01778 18 360

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