How It Works
Technical view
The active path uses the familiar high-pass, low shelf, and 930 Hz pre-shape, but instead of a straight tanh stage it adds gain and positive offset before the nonlinear block. That asymmetry makes the clipping less even between waveform halves, so the harmonic profile is rougher than the otherwise similar soft-clip overdrives.
- Drive, Boost & Saturation
- waveshaping / saturation
- delay processing
- oscillator / LFO modulation
- DC blocking
Signal Path
Compiled preview chain
Preview source: An internally generated picked-string phrase is widened to stereo with a 19-sample right-channel delay and slight left/right shelf-EQ offsets before it reaches the active drive path.
- 1internal picked-string demo phrase
- 2stereo spread with a short right-channel delay
- 3high-pass cleanup
- 4low-shelf and 930 Hz contour shaping
- 5gain plus positive bias before tanh clipping
- 6post-drive high-shelf tone shaping
- 7dry / wet mix
- 8DC blocker
- 9output gain trim
- 10final tanh limiter
Preview source
An internally generated picked-string phrase is widened to stereo with a 19-sample right-channel delay and slight left/right shelf-EQ offsets before it reaches the active drive path.
Effect core
Single-stage biased tanh overdrive with asymmetric pre-offset before clipping.
Signal path
The static waveform and the live player both reflect this compiled signal chain.
- internal picked-string demo phrase
- stereo spread with a short right-channel delay
- high-pass cleanup
- low-shelf and 930 Hz contour shaping
- gain plus positive bias before tanh clipping
- post-drive high-shelf tone shaping
- dry / wet mix
- DC blocker
- output gain trim
- final tanh limiter
Controls that matter
These are the currently active controls detected in the FAUST source for this effect.
- mix: Blends the clean stereo preview source with the soft-clipped overdrive path.
- output_gain_db: Applies final post-effect level trim after the DC blocker.
- drive: Raises the level feeding the single tanh saturation stage.
- tone: Controls the post-drive high shelf after saturation.
- contour: Changes the low shelf and 930 Hz emphasis ahead of clipping.
Code-backed analysis
The generated description is tied to the active helper blocks and routing found in the current DSP.
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- driveTone
- phraseMono
- previewShiftSamples
Controls
Audible controls in this DSP
Blends the clean stereo preview source with the soft-clipped overdrive path.
Lower values keep more dry articulation; higher values favor the overdrive voice.
Applies final post-effect level trim after the DC blocker.
Balances loudness without changing how the clipping stage behaves.
Raises the level feeding the single tanh saturation stage.
Moves the patch from light breakup toward thicker, more compressed overdrive.
Controls the post-drive high shelf after saturation.
Brightens the clipped signal for more edge or smooths it for a darker voice.
Changes the low shelf and 930 Hz emphasis ahead of clipping.
Pushes more body or midrange into saturation, changing how focused the overdrive feels.
Analysis
Code-derived notes
Reviewed against the current DSP. This file is one of the few overdrives in the current set that actually changes the clipping behavior instead of only moving EQ coefficients.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- driveTone
- phraseMono
- previewShiftSamples
- softsat
- pickedVoice
- fund
- pickEnv
- ampEnv
- triggerAt
- maxDelaySamples
Inactive helpers
- synthVoice
- organVoice
- bellVoice
- quantize
- combLP
- echoOnly
- diffuser
Warnings
No current warnings are attached to this effect.
Source
- library/drive-boost-saturation/asymmetric-overdrive.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 14