3-Voice 6-Stage Op-Amp Distortion PUBLIC

3-Voice 6-Stage Op-Amp Distortion with Diode Fuzz

3-voice 6-stage op-amp distortion circuit with shunt-type diode fuzz and 3-band Fender-style tone-stack. Distortion voices are from three different types of op-amps (JFET-input, BJT-input, and CMOS-input), obtained by driving one op-amp with the other in the same IC. IC1, the JFET device, drives the other two ICs, but all three distortion signals get mixed at the tone-stack. Fuzz is obtained from standard silicon diodes in a shunt-type hard-clipping array. Controls Include: V1 Gain, V1 Level, V2 Drive, V2 Gain, V2 Level, Fuzz enable switch, Fuzz symmetry switches (two, with 2 settings each), Fuzz Depth, V3 Drive, V3 Gain, V3 Level, High Trim, Low Trim, Bass, Mid, Treble, and Volume. Frequency Range 80 Hz to 4 kHz, with emphasis on lows. Suitable for 6-string electric guitar. [Not recommended for 7/8-string guitars or any bass-guitar.] Maximum Gain = +21.8 dBV @ 400 Hz with all controls at 50%, or > twice that with all controls at 100%. Power-supply not shown. Requires a regulated dual-polarity supply providing +-9VDC or +-12VDC or +-15VDC at >= 60 mA of current. And though simulator verified, treat the circuit as experimental. Breadboard test before committing to a soldered build.