2-Voice Diode Fuzz w. 2-Band Tone PUBLIC

2-Voice Diode Fuzz with 2-Band Tone and Frequency Shift

2-voice diode-fuzz circuit with 2-band tone and a frequency shift control. Uses a quad FET-input op-amp ICs and ten diodes of two different kinds. Controls Include: Input Gain, Bass, Center, Treble, Drive, Clean Level, Fuzz 1 enable switch, Fuzz 1 symmetry switches (two, with 2 settings each), Fuzz 1 Depth, Fuzz Level, Fuzz 2 enable switch, Fuzz 2 symmetry switches (two, with 2 settings each), Fuzz 2 Depth, Frequency Shift, Output Gain, and Volume. Range at or above 0 dBV is from 25 Hz to 13.3 kHz. Suitable for 6/7/8-string guitar or 4/5/6-string bass. Maximum gain = +33.3 dBV @ 250 Hz with all controls at 50%, or +59 dBV @ 160 Hz with all controls at 100%. The Shift control affects gains at different frequencies, shifting between emphasizing lows and highs. Diode arrays have little/no effect on gains or frequencies but offer fuzz from clipping, with standard silicon diodes in a feedback-type array, and Schottky diodes in a shunt-type array. Power-supply not shown. Requires a regulated dual-polarity DC supply providing +-9VDC or +-12VDC or +-15VDC at >= 50 mA of current. And while simulator verified, treat the circuit as experimental. Breadboard test it before committing to a soldered build. And house in a grounded metal enclosure.