Godess One

Reverse-engineered Godess One-style distortion engineering baseline for Greybound pedal modeling.

Godess One is Greybound's first distortion pedal model. It targets a Godess One-style control surface: distortion, tone, level, and a Standard/Custom voicing switch. Standard mode keeps the tighter, brighter hard-clipped character; Custom mode adds more gain, body, and mid fill.

Circuit Diagram

Diagram data lives in knowledge/models/pedals/distortion/diagrams/godess-one.diagram.json5.

This JSON5 graph is a documentation and renderer artifact. It maps the buffered input, pre-emphasis, clipping stage, tone network, mode-dependent voice, and output source impedance to the current Rust emulation.

Baseline Assumptions

Buffered input with about 1 MOhm input impedance.
Low output impedance suitable for driving another pedal or the amp input.
Input coupling that removes DC before the drive network.
Pre-emphasis before clipping to keep the distortion bright and articulate.
Harder symmetrical diode clipping than the overdrive models.
Tone control that blends body and edge after clipping.
Standard and Custom voices that share the same control set but alter gain, low/mid body, and top-end emphasis.

Controls

distortion: gain into the clipping stage.
tone: low/high post-clip tone blend.
level: final output level into the next load.
mode: standard or custom.
bypass: routing state; active circuit state remains private to the pedal instance.

External Boundaries

The pedal receives and emits voltage plus impedance:

input source: guitar pickup or previous pedal output,
input load: Godess One input impedance plus cable capacitance memory,
output source: pedal output voltage plus output impedance,
output load: amp input, next pedal, or FX-loop return.

ConnectionState owns cable capacitance and source/load division. Godess One should not mutate amp internals.

Current DSP Approximation

The first implementation is a scalar approximation:

high-pass input coupling,
mode-dependent pre-emphasis and body mix,
pre-clip low-pass smoothing,
diode-pair soft limit plus hard clipping contribution,
post-clip smoothing,
low/high tone blend with mode-dependent mid fill,
output low-pass smoothing and low source impedance.

This is not yet a component-exact discrete analog solve. It is intentionally shaped around useful engineering boundaries first so it can participate correctly in arbitrary rig ordering.

Validation Gates

The model is not component-exact until:

input and output impedance targets are measured against reference data,
distortion sweep changes clipping density and sustain without unstable level jumps,
tone sweep changes edge and body across several input amplitudes,
Standard and Custom modes are validated against reference captures,
output level into 1 MOhm, 500 kOhm, 220 kOhm, and 100 kOhm loads behaves plausibly,
SPICE or measured captures validate individual stage responses.

Measurement Protocol

Hardware or SPICE captures should include:

supply voltage and current draw,
input impedance at 100 Hz, 1 kHz, 5 kHz, and 10 kHz,
output impedance across level settings,
bypass behavior,
distortion, tone, and level potentiometer taper,
Standard and Custom mode switch behavior,
pre-emphasis output, clipping output, tone output, and final output probes,
sine tests at 82 Hz, 110 Hz, 220 Hz, 440 Hz, 1 kHz, 3 kHz, and 6 kHz,
input amplitudes from 20 mV RMS to 1 V RMS, with large amplitudes only from a buffered source.