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Official effect

Reverse Reverb

Reverse-like wash from a smoothed diffuse reverb tail rather than true reversed playback.

The current reverse-style family does not reverse buffered reverb audio. Instead, it runs the shared diffuse reverb core through a post-reverb low-pass and blends that smoothed tail with the dry source. `space` and `decay` shape the underlying core, and `tone` opens both the core brightness and the final low-pass.

  • Reverb & Space
  • Library #166
  • Preview 8s

Waveform preview

Static peaks come from the compiled FAUST preview render. The live scope is drawn from the browser playback output in real time.

Timeline
0:00 / 0:08
Source
Compiled browser preview
Live oscilloscope from the browser playback output.AnalyserNode keeps the signal path unchanged while exposing the waveform.

How It Works

Technical view

The current reverse-style family does not reverse buffered reverb audio. Instead, it runs the shared diffuse reverb core through a post-reverb low-pass and blends that smoothed tail with the dry source. `space` and `decay` shape the underlying core, and `tone` opens both the core brightness and the final low-pass.

  • Reverb & Space
  • 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 reverb core.

  1. 1internal picked-string demo phrase
  2. 2stereo spread with a short right-channel delay
  3. 3four parallel damped comb stages
  4. 4two serial diffuser stages
  5. 5post-reverb high-shelf shaping
  6. 6post-reverb low-pass smoothing
  7. 7dry / wet blend
  8. 8DC blocker
  9. 9output gain trim
  10. 10final 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 reverb core.

Effect core

Diffuse reverb core followed by post-reverb low-pass smoothing for a reverse-like wash.

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
  • four parallel damped comb stages
  • two serial diffuser stages
  • post-reverb high-shelf shaping
  • post-reverb low-pass smoothing
  • dry / wet 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 wet reverb field after the reverb core.
  • output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
  • space: Expands the comb-and-diffuser lengths of the underlying diffuse reverb core.
  • decay: Raises the feedback coefficients inside the underlying diffuse reverb core.
  • tone: Raises the damping cutoffs in the reverb core and opens the post-reverb low-pass filter.

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
  • verbFx
  • phraseMono
  • previewShiftSamples

Controls

Audible controls in this DSP

  • mix

    Active

    Blends between the dry source and the wet reverb field after the reverb core.

    Lower settings stay more direct; higher settings move the patch further into the ambient tail.

  • output_gain_db

    Active

    Applies final post-effect level trim after DC blocking and before the output limiter.

    Matches loudness without changing the actual reverb structure.

  • space

    Active

    Expands the comb-and-diffuser lengths of the underlying diffuse reverb core.

    Moves the reverse-like wash from tighter ambience toward a larger smear.

  • decay

    Active

    Raises the feedback coefficients inside the underlying diffuse reverb core.

    Extends the tail that feeds the reverse-like wash.

  • tone

    Active

    Raises the damping cutoffs in the reverb core and opens the post-reverb low-pass filter.

    Makes the reverse-like wash darker at low settings and more open at high settings.

Analysis

Code-derived notes

Current implementation shares the same low-passed reverse-like reverb wash across Reverse Reverb and Reverse IR.

Active blocks

  • demo
  • fx
  • outputStage
  • leftDemo
  • rightDemo
  • verbFx
  • phraseMono
  • previewShiftSamples
  • verbWet
  • pickedVoice
  • verbCore
  • fund
  • pickEnv
  • ampEnv
  • triggerAt
  • combLP
  • diffuser
  • maxDelaySamples

Inactive helpers

  • synthVoice
  • organVoice
  • bellVoice
  • softsat
  • quantize
  • echoOnly

Warnings

No current warnings are attached to this effect.

Source

  • library/reverb-space/reverse-reverb.dsp
  • Output stage: DC blocker -> output gain trim -> final tanh limiter
  • Library position: 166

More In Reverb & Space

Continue through the library

Each effect page uses the same generated description pipeline and compiled waveform preview assets.

Plate

Smooth diffuse reverb from a four-comb, two-diffuser plate-style core.

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Spring

Spring-flavored ambience built by layering a short resonant comb onto the shared diffuse reverb core.

View How It Works

Cloud Reverb

Currently the same expanded-diffusion hall core as Hall rather than a separately voiced cloud engine.

View How It Works