Harmonic Percolator

Lurch Audio

Ergot is a fungal infection which forms mostly on rye and contains a number of psychedelic alkaloids such as Ergoline, Ergotamine, and Ergine. Consumption of Ergot fungus may result in psychosis, loss of limb, or death.

Ergot (the pedal) is mostly based around a Harmonic Percolator. It's got some tweaks, it's got some extras, and it's got a nasty fungal infection. The silicon version sounds nearly identical to the original. If we're splitting hairs I would say it tends to have a touch more gain and the touchpads behave a bit more like a low pass filter with less hissy/spitty noise. But again, very very similar.

V (Volume): is a volume control

T (Tone): sweeps between two capacitors, allowing more or less bass into the circuit

H (Harmonics): the classic percolator gain control, basically a volume pot at the beginning of the circuit that adjusts how hard you hit the transistors

Toggle switches:

Brightness: dictates how much high end is let in to the circuit. This makes a larger difference when using the feedback loop or in hi-gain mode

Diode clipping: 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.

Gain mode: switches between the classic Ergot sound (the lower gain mode) and a big beefy saturated "higher-gain" mode

F/B footswitch 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.

https://lurchaudio.bigcartel.com/product/ergot-si