How It Works
Technical view
The current implementation matches Formant Filter and Talking Filter exactly: three parallel band-pass stages move from a shared vowel-position LFO. It already morphs between vowel-like regions, but it is not yet differentiated into a separate morphing architecture.
- Filter, Wah & Envelope
- band-pass filtering
- 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
- 3LFO-driven formant position sweep
- 4parallel three-band band-pass bank
- 5dry / wet mix
- 6DC blocker
- 7output gain trim
- 8final 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
Three-band formant bank with shared LFO-driven vowel-position modulation.
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
- LFO-driven formant position sweep
- parallel three-band band-pass bank
- 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: Adjusts the lower formant band placement and bandwidth of the first band-pass stage.
- motion: Adjusts the width of the middle formant band while contributing to the overall vowel contrast.
- rate: Sets the speed of the internal vowel-position LFO that sweeps the band-pass centers.
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.
Adjusts the lower formant band placement and bandwidth of the first band-pass stage.
Changes the weight and mouth-like emphasis of the lower vowel region.
Adjusts the width of the middle formant band while contributing to the overall vowel contrast.
Changes how hollow or nasal the moving vowel shape feels.
Sets the speed of the internal vowel-position LFO that sweeps the band-pass centers.
Changes how quickly the filter morphs between vowel-like positions.
Analysis
Code-derived notes
Current implementation shares the same three-band moving formant core across Formant Filter, Talking Filter, and Vowel Morpher.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- filterCore
- phraseMono
- previewShiftSamples
- vowelPos
- pickedVoice
- fund
- pickEnv
- ampEnv
- triggerAt
- maxDelaySamples
Inactive helpers
- synthVoice
- organVoice
- bellVoice
- softsat
- quantize
- combLP
- echoOnly
- diffuser
Warnings
No current warnings are attached to this effect.
Source
- library/filter-wah-envelope/vowel-morpher.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 74