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Official effect

Mid/Side EQ

Broad three-stage EQ that currently runs the same left/right shelf-plus-peak core as the other EQ variants.

The current code does not encode to mid/side, process mid and side separately, and decode back. It simply uses the same stereo low shelf, sweepable peaking filter, and high shelf as Parametric EQ, so it is presently a naming variant of that shared three-band EQ core.

  • Compression, Gate & EQ
  • Library #59
  • 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 code does not encode to mid/side, process mid and side separately, and decode back. It simply uses the same stereo low shelf, sweepable peaking filter, and high shelf as Parametric EQ, so it is presently a naming variant of that shared three-band EQ core.

  • Compression, Gate & EQ
  • 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 dynamics or EQ core.

  1. 1internal picked-string demo phrase
  2. 2stereo spread with a short right-channel delay
  3. 3low-shelf shaping
  4. 4single sweepable mid peak stage
  5. 5high-shelf shaping
  6. 6dry / wet mix
  7. 7DC blocker
  8. 8output gain trim
  9. 9final 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 dynamics or EQ core.

Effect core

Static stereo low shelf, single sweepable mid peak, and high shelf in series.

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
  • low-shelf shaping
  • single sweepable mid peak stage
  • high-shelf 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 processed path after the core effect.
  • output_gain_db: Applies final post-effect level trim after DC blocking and before the output limiter.
  • shape: Adjusts the gain of the single peaking EQ stage.
  • tone: Moves the peaking EQ center upward while also adjusting the final high shelf.
  • contour: Adjusts the low-shelf gain.

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

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

    Lower settings keep more dry attack and natural dynamics; higher settings push the processed behavior forward.

  • output_gain_db

    Active

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

    Matches loudness without changing the actual dynamic or EQ structure.

  • shape

    Active

    Adjusts the gain of the single peaking EQ stage.

    Boosts or cuts the central band equally across the stereo channels.

  • tone

    Active

    Moves the peaking EQ center upward while also adjusting the final high shelf.

    Changes mid focus and brightness, but not actual mid-versus-side balance.

  • contour

    Active

    Adjusts the low-shelf gain.

    Adds or removes low-end weight equally on both channels.

Analysis

Code-derived notes

Current implementation shares the same three-band static EQ core as Parametric EQ, Dynamic EQ, 6-Band EQ, 10-Band EQ, and Tilt EQ, and does not yet perform true mid/side processing.

Active blocks

  • demo
  • fx
  • outputStage
  • leftDemo
  • rightDemo
  • leftFx
  • rightFx
  • phraseMono
  • previewShiftSamples
  • leftWet
  • rightWet
  • pickedVoice
  • midFx
  • sideFx
  • fund
  • pickEnv
  • ampEnv
  • triggerAt
  • maxDelaySamples

Inactive helpers

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

Warnings

No current warnings are attached to this effect.

Source

  • library/compression-gate-eq/mid-side-eq.dsp
  • Output stage: DC blocker -> output gain trim -> final tanh limiter
  • Library position: 59

More In Compression, Gate & EQ

Continue through the library

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

Studio Compressor

Balanced envelope-controlled leveling with mild low-end contour shaping and a restrained high-shelf finish.

View How It Works

Optical Compressor

Smooth envelope-leveling compressor that currently uses the same gain-scaling core as Studio Compressor.

View How It Works

Parametric EQ

Three-stage EQ with low shelf, one sweepable mid peak, and a final high shelf.

View How It Works