How It Works
Technical view
The current rotary core splits each channel into a low-passed branch that is amplitude-modulated and a high-passed branch that runs through a short moving delay before both are recombined. `rate` sets the rotor LFO speeds, `depth` increases the high-band delay excursion, `tone` moves the low and high crossover regions, and `mix` blends that rotating texture back with the dry stereo phrase.
- Chorus, Phaser, Flanger & Motion
- 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 modulation core.
- 1internal picked-string demo phrase
- 2stereo spread with a short right-channel delay
- 3low and high band split
- 4low-band amplitude modulation
- 5high-band short-delay rotor sweep
- 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 modulation core.
Effect core
Split-band rotary motion core with low-band amplitude modulation and high-band short-delay swirl.
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
- low and high band split
- low-band amplitude modulation
- high-band short-delay rotor sweep
- 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 processed path after the modulation core.
- output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
- depth: Increases the excursion of the short high-band delay modulation inside the rotary core.
- rate: Sets the speeds of the offset rotor LFOs on the left and right channels.
- tone: Moves the low-pass and high-pass split points that separate the rotary low and high bands.
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
- leftFx
- rightFx
- phraseMono
Controls
Audible controls in this DSP
Blends the untouched stereo preview source with the processed path after the modulation core.
Lower settings keep more direct attack and body; higher settings push the effected motion further forward.
Applies final post-effect level trim after DC blocking and before the output limiter.
Matches loudness without changing the actual modulation or filtering structure.
Increases the excursion of the short high-band delay modulation inside the rotary core.
Adds more swirl and motion to the brighter rotor component.
Sets the speeds of the offset rotor LFOs on the left and right channels.
Changes how quickly the rotating cabinet illusion turns.
Moves the low-pass and high-pass split points that separate the rotary low and high bands.
Shifts the balance between warm throb and brighter horn-like movement.
Analysis
Code-derived notes
Current implementation shares the same split-band rotary core between Rotary Speaker and Harmonic Rotator.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- leftFx
- rightFx
- phraseMono
- previewShiftSamples
- rotorA
- rotorB
- pickedVoice
- slowA
- maxDelaySamples
- slowB
- fund
- pickEnv
- ampEnv
- triggerAt
Inactive helpers
- synthVoice
- organVoice
- bellVoice
- softsat
- quantize
- combLP
- echoOnly
- diffuser
Warnings
No current warnings are attached to this effect.
Source
- library/chorus-phaser-flanger-motion/rotary-speaker.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 88