How It Works
Technical view
This effect keeps the dry signal intact and adds a second branch that high-passes the audio, drives it through tanh saturation, and scales it back in parallel. `focus` sets the crossover into that exciter branch, `motion` raises the saturation amount, and `rate` controls the exciter branch level rather than any time-based modulation.
- Filter, Wah & Envelope
- 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 hits the filter core.
- 1internal picked-string demo phrase
- 2stereo spread with a short right-channel delay
- 3parallel high-passed exciter branch
- 4soft saturation on the exciter branch
- 5sum with the dry signal
- 6dry / wet mix
- 7DC blocker
- 8output gain trim
- 9final 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 hits the filter core.
Effect core
Parallel high-passed saturation branch blended back with the dry signal.
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
- parallel high-passed exciter branch
- soft saturation on the exciter branch
- sum with the dry signal
- 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 untouched stereo preview source with the filtered path after the effect core.
- output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
- focus: Sets the high-pass cutoff feeding the exciter branch.
- motion: Raises the saturation amount applied to the exciter branch.
- rate: Sets the gain of the exciter branch after saturation.
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
- filterCore
- phraseMono
- previewShiftSamples
Controls
Audible controls in this DSP
Blends the untouched stereo preview source with the filtered path after the effect core.
Lower settings preserve more dry attack and full-band tone; higher settings emphasize the filter treatment.
Applies final post-effect level trim after DC blocking and before the output limiter.
Matches loudness without changing the filter behavior itself.
Sets the high-pass cutoff feeding the exciter branch.
Moves the added harmonic emphasis higher or lower in the spectrum.
Raises the saturation amount applied to the exciter branch.
Adds more harmonic edge and brightness.
Sets the gain of the exciter branch after saturation.
Changes how much of the excited high-band content is blended in; it is not a time control in the current code.
Analysis
Code-derived notes
Current implementation is a distinct parallel harmonic-enhancement path rather than a time-modulated filter.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- filterCore
- 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/filter-wah-envelope/harmonic-exciter.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 83