How It Works
Technical view
The current `Slapback` path uses one short delay tap per channel with post-delay high-shelf shaping and blends those repeats against a mostly preserved dry source. `time` adjusts the short tap spacing, `tone` brightens the slap repeat, and the declared `feedback` control is unused in the current preview, so this patch behaves as a single-repeat slap rather than a repeating echo.
- 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
- 3short left and right slap delays
- 4post-delay high-shelf shaping
- 5slap repeat blended against a mostly preserved dry source
- 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
Short single-repeat stereo slapback with post-delay high-shelf shaping.
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
- short left and right slap delays
- post-delay high-shelf shaping
- slap repeat blended against a mostly preserved dry source
- 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: Raises the single short repeat while only slightly reducing the dry source in the current blend formula.
- output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
- time: Sets the short left and right slap times.
- feedback: Declared in the shared control set but unused in the current preview code.
- tone: Adjusts the high shelf on the slap repeats.
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
Raises the single short repeat while only slightly reducing the dry source in the current blend formula.
Pushes the slap repeat forward while keeping most of the direct hit intact.
Applies final post-effect level trim after DC blocking and before the output limiter.
Matches loudness without changing the actual delay structure.
Sets the short left and right slap times.
Moves the repeat between very tight doubling and looser rockabilly-style space.
Declared in the shared control set but unused in the current preview code.
Changing it currently has no effect on the sound.
Adjusts the high shelf on the slap repeats.
Makes the repeat darker or brighter.
Analysis
Code-derived notes
Current implementation is a single-repeat stereo slapback; the declared feedback control is inactive.
Active blocks
- demo
- fx
- outputStage
- leftDemo
- rightDemo
- leftFx
- rightFx
- phraseMono
- previewShiftSamples
- maxDelaySamples
- slapA
- slapB
- pickedVoice
- 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/delay-echo/slapback.dsp
- Output stage: DC blocker -> output gain trim -> final tanh limiter
- Library position: 132