How It Works
Technical view
The current diffusion family feeds a conventional echo into two serial allpass-style diffuser stages and then blends the result with the dry source. `time` stretches both the base delay and the diffuser lengths, `feedback` raises the repeat density and diffuser recirculation, and `tone` opens the damping feeding the wash. There is no separate shimmer, pitch, or harmonic halo layer in the current code.
- Delay & Echo
- 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 delay core.
- 1internal picked-string demo phrase
- 2stereo spread with a short right-channel delay
- 3base feedback delay
- 4serial diffuser stages
- 5dry / processed blend
- 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 delay core.
Effect core
Feedback echo feeding two serial diffuser stages for a smeared repeat field.
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
- base feedback delay
- serial diffuser stages
- dry / processed blend
- 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 between the dry source and the processed delay texture after the effect core.
- output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
- time: Sets the base echo delay and lengthens the diffuser stages that follow it.
- feedback: Raises both the base echo feedback amount and the recirculation inside the diffuser stages.
- tone: Raises the damping cutoff feeding the echo and diffusion network.
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
- channelFx
- phraseMono
- previewShiftSamples
Controls
Audible controls in this DSP
Blends between the dry source and the processed delay texture after the effect core.
Lower settings stay more direct; higher settings move the patch toward the effected repeat field.
Applies final post-effect level trim after DC blocking and before the output limiter.
Matches loudness without changing the actual delay structure.
Sets the base echo delay and lengthens the diffuser stages that follow it.
Moves the wash from tighter thickening toward a more expanded blur.
Raises both the base echo feedback amount and the recirculation inside the diffuser stages.
Builds a denser, longer cloud of repeats.
Raises the damping cutoff feeding the echo and diffusion network.
Makes the wash darker at low settings and clearer at high settings.
Analysis
Code-derived notes
Current implementation shares the same diffused echo core across Diffusion Delay, Smear Delay, and Halo Delay. Halo Delay does not yet add a separate halo or shimmer layer.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- channelFx
- phraseMono
- previewShiftSamples
- halo
- haloDelayMono
- pickedVoice
- echoOnly
- delayA
- diffuser
- fund
- pickEnv
- ampEnv
- triggerAt
- combLP
- maxDelaySamples
Inactive helpers
- synthVoice
- organVoice
- bellVoice
- softsat
- quantize
Warnings
No current warnings are attached to this effect.
Source
- library/delay-echo/halo-delay.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 154