Abstract
An electronic audio signal processor especially suitable for electrical instruments such as electric guitars is provided, including a distortion stage, filtering stages, an output gain stage, and a compressor stage having a varibale release time. These stages are provided in a cascade connection. Further, the characteristics of each of these stages are preset to provide optimum performance at each of several different distortion levels. The correct characteristics of each stage for each distortion level is selected by means of a single user control.
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means responsive to said indicating means for controlling the degree of distortion caused by said distortion means, said distortion means having an output volume which varies in a predetermined way as the degree of distortion increases; and
output means responsive to said indicating means for automatically, and without further user input, maintaining the volume of the audio signal output from said circuit substantially at a desired level regardless of the degree of distortion caused by said distortion means.