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Official effect

Harmonic Reverb

Currently the same diffuse-reverb-plus-shimmer-layer architecture as Shimmer rather than a separately voiced harmonic engine.

The current shimmer-style family does not pitch-shift the live reverb tail. Instead, it blends the shared diffuse reverb core with a separately synthesized bright picked phrase that is mixed into the wet field. `space` and `decay` only reshape the underlying reverb core, while `tone` brightens that core beneath the fixed-bright auxiliary shimmer layer.

  • Reverb & Space
  • Library #169
  • 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 shimmer-style family does not pitch-shift the live reverb tail. Instead, it blends the shared diffuse reverb core with a separately synthesized bright picked phrase that is mixed into the wet field. `space` and `decay` only reshape the underlying reverb core, while `tone` brightens that core beneath the fixed-bright auxiliary shimmer layer.

  • 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 as the dry source, and the shimmer-style patches also layer a separately synthesized bright picked phrase into the wet field instead of pitch-shifting the live reverb tail.

  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. 6separately synthesized shimmer phrase
  7. 7dry / wet blend with auxiliary shimmer layer
  8. 8DC blocker
  9. 9output gain trim
  10. 10final tanh limiter

Preview source

An internally generated picked-string phrase is widened to stereo as the dry source, and the shimmer-style patches also layer a separately synthesized bright picked phrase into the wet field instead of pitch-shifting the live reverb tail.

Effect core

Diffuse comb-and-diffuser reverb plus a separately synthesized shimmer phrase blended into the wet 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
  • four parallel damped comb stages
  • two serial diffuser stages
  • post-reverb high-shelf shaping
  • separately synthesized shimmer phrase
  • dry / wet blend with auxiliary shimmer layer
  • 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: Scales both the diffuse reverb field and the separately synthesized shimmer layer against the dry source.
  • 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 of the underlying diffuse reverb core.
  • tone: Brightens the underlying diffuse reverb core; the auxiliary shimmer phrase itself stays fixed-bright in the current code.

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

  • mix

    Active

    Scales both the diffuse reverb field and the separately synthesized shimmer layer against the dry source.

    Lower settings keep the direct phrase forward; higher settings bring up both the reverb bloom and the added harmonic lift.

  • 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 ambience from a closer halo toward a larger floating wash.

  • decay

    Active

    Raises the feedback coefficients of the underlying diffuse reverb core.

    Extends the reverb tail beneath the added harmonic layer.

  • tone

    Active

    Brightens the underlying diffuse reverb core; the auxiliary shimmer phrase itself stays fixed-bright in the current code.

    Changes how dark or open the supporting reverb tail feels under the added shimmer voice.

Analysis

Code-derived notes

Current implementation shares the same diffuse-reverb-plus-synthesized-shimmer architecture across Shimmer, Harmonic Reverb, and Chorale Reverb. Harmonic Reverb is not yet differentiated from Shimmer.

Active blocks

  • demo
  • fx
  • outputStage
  • leftDemo
  • rightDemo
  • leftFx
  • rightFx
  • phraseMono
  • previewShiftSamples
  • verbWet
  • shimmerLeft
  • shimmerRight
  • pickedVoice
  • verbCore
  • shimmerMono
  • 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/harmonic-reverb.dsp
  • Output stage: DC blocker -> output gain trim -> final tanh limiter
  • Library position: 169

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.

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Cloud Reverb

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

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