The ZXY 2207 600:10K is an Audio transformer to amplify quitar's waveform (50-900mv)input to 4-10 volts output .That circuit is not made yet it shows up here in the simulator.zeners and rectifier diodes give the preform wave output shape and op amp sharp it and hold it at standard output values.The circuit is caming with four pots " pitch gain,gain,2 output volume,with an optional switch to change distortion to overdrive.Change input parameter 80-900 mV and 50-800 Hz frequency to see the output resaults.when the input signal fade out, output is linear fade too but in low scale.This should be effect the harmonics and maybe give a spicy crispy sequence output sound transformation.ENJOY IT.
