Multiple Waveform Distortion Circuit PUBLIC

Multiple Waveform Distortion Circuit for Electric Guitar

A multiple waveform distortion circuit for electric guitar. Involves the mixing of sine-waves (original input signal), square-waves (converted from input signal, at same frequency), triangle-waves (converted from the square-waves), and sawtooth-waves (converted from the square-waves). Controls Include: Gain, Clean Drive, Clean Level, Sense (sensitivity), Square-Wave, Triangle-Wave, Sawtooth-Wave, and Volume. No tone controls. Frequency range between the -3 dBV corners, with all controls at 50%, is from 7 Hz to 16 kHz, and between the 0 dBV crosspoints from 8 Hz to 14.5 kHz. Suitable for 6/7/8-string guitar or 4/5/6-string bass. Sine-waves correspond to the input signal. Square-waves at the same frequency are converted from the input signal using a Comparator (IC3d). Triangle-waves and Sawtooth-waves are converted from the square-waves using an Integrator (IC3c) and Differentiator (IC3b), respectively. The four signals have separate level controls and are mixed in a summing-amp (IC3a) at the output. The ICs were chosen to ensure clean operation of the op-amps, though some distortion and/or fuzz is inherent to the non-sinusoidal waveforms, and the input signal will include a certain amount of distortion and noise that is will not be eliminated by this circuit. A special power-supply is required; a regulated +-9VDC supply providing >= 60 mA of current, and with +-5VDC taps. And while simulator verified, this is an experimental circuit. Thus, it must be thoroughly breadboard tested before committing it to a soldered build.