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Official effect

Octave Fuzz

Saturated fuzz with a rectified upper-octave layer riding above the main clipped signal.

The main branch high-passes the input and drives it into a tanh fuzz stage, while a second branch full-wave rectifies the signal, high-passes it again, low-passes the result, and blends it back in as an upper-octave texture. `tone` currently affects both the strength of that octave branch and the final high shelf, while the shared `bias` control is declared but unused in this preview.

  • Fuzz & Destruction
  • Library #28
  • 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 main branch high-passes the input and drives it into a tanh fuzz stage, while a second branch full-wave rectifies the signal, high-passes it again, low-passes the result, and blends it back in as an upper-octave texture. `tone` currently affects both the strength of that octave branch and the final high shelf, while the shared `bias` control is declared but unused in this preview.

  • Fuzz & Destruction
  • 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 fuzz core.

  1. 1internal picked-string demo phrase
  2. 2stereo spread with a short right-channel delay
  3. 3main high-passed tanh fuzz branch
  4. 4rectified octave-up branch
  5. 5parallel branch sum
  6. 6post-fuzz high-shelf tone shaping
  7. 7dry / wet mix
  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 fuzz core.

Effect core

Parallel fuzz and rectified upper-octave branch with post-mix high-shelf tone 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
  • main high-passed tanh fuzz branch
  • rectified octave-up branch
  • parallel branch sum
  • post-fuzz high-shelf tone shaping
  • 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 fuzzed path after the effect core.
  • output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
  • fuzz: Raises the gain feeding the main tanh fuzz branch.
  • tone: Raises the level of the rectified octave branch and adjusts the post-fuzz high shelf.
  • bias: Declared in the shared control set but unused in the current preview 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
  • fuzzCore
  • phraseMono
  • previewShiftSamples

Controls

Audible controls in this DSP

  • mix

    Active

    Blends the untouched stereo preview source with the fuzzed path after the effect core.

    Lower settings preserve more pick attack and clean body; higher settings push the fuzz treatment to the front.

  • output_gain_db

    Active

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

    Matches loudness without changing the actual fuzz structure.

  • fuzz

    Active

    Raises the gain feeding the main tanh fuzz branch.

    Adds more saturation and sustain to the fundamental fuzz voice.

  • tone

    Active

    Raises the level of the rectified octave branch and adjusts the post-fuzz high shelf.

    Brings out more octave splash and top-end bite at higher settings.

  • bias

    Active

    Declared in the shared control set but unused in the current preview code.

    Changing it currently has no effect on the sound.

Analysis

Code-derived notes

Current implementation uses an octave branch but does not use the shared bias control.

Active blocks

  • demo
  • fx
  • outputStage
  • leftDemo
  • rightDemo
  • fuzzCore
  • phraseMono
  • previewShiftSamples
  • softsat
  • pickedVoice
  • fund
  • pickEnv
  • ampEnv
  • triggerAt
  • maxDelaySamples

Inactive helpers

  • synthVoice
  • organVoice
  • bellVoice
  • quantize
  • combLP
  • echoOnly
  • diffuser

Warnings

No current warnings are attached to this effect.

Source

  • library/fuzz-destruction/octave-fuzz.dsp
  • Output stage: DC blocker -> output gain trim -> final tanh limiter
  • Library position: 28

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