Ergot is mostly based around a Harmonic Percolator. It's got some tweaks, it's got some extras, it's got the classic 2N404A germanium transistor, and it's got a nasty fungal infection.
The Tone control sweeps between two capacitors, allowing more or less bass in to the circuit.
The "Brightness" toggle switch dictates how much high end is let in to the circuit. This makes a larger difference when using the feedback loop or wavefolder.
The diode clipping switch has asymmetric schottky diodes in the down position for a more "vintage" heavy clipping, no clipping diodes in the middle position, and an LED and silicon diode in the up position for subtler, sharper clipping.
The F/B footswitch also engages a feedback loop, and the touch pads. Turning the F/B knob controls the amount of feedback, while the touch pads can be used to increase feedback even further using your fingers, toes, really any part of your/your friend's fleshy vessel(s) or other conductive materials.
The effect of the feedback loop will vary depending on pedal settings, other pedals, your guitar pickups, the position of the sun and the moon, what you had for breakfast idk. With a little knob twiddling you can get gurgling glitched out octaves, comb filtered gasps, wailing drones and so on.
This sick, weird little guy is lightly used, and we'll ship it to you super fast and super safe. Feel free to give us a call with any questions you may have about it!