Delta Sound Labs Fold

Wavefolding/Distortion Synthesis Plugin

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  • Regular price $49.00
    Digital Product - Delivered via Email.
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Apple Silicon Compatible
AAX Native - Compatible with Pro Tools 11 and above
AudioUnits Format VST3 Format
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Fold is a distortion synthesis audio effect plug-in that only the engineers at Delta Sound Labs could dream up.

Calling on their background in modular hardware design, the team has found a novel approach to creating warmth and distortion in software.

By using an assortment of modules in an in-series FX chain, Fold imbues input signals with harmonically rich overtones and, if pushed to the extremes, completely transforms them with a unique form of distortion.

At the heart of Fold is its wavefolding engine.

First pioneered by synth legend Don Buchla, wavefolding is the act of folding a wave back on itself after reaching a given threshold.

While this naturally produces distortion and harmonics, Fold also includes a bit crusher module to further smash the input signal.

Fold's combination of oversampling, distortion, and wavefolding results in tones that are timbrally rich on one hand, and over-the-top destroyed on the other, even with simple periodic input signals.

To tame the sound, Fold comes with an analog emulation of a resonant low-pass filter that offers more control over any unhinged results.

Each parameter is also syncable to its own LFO, each with an amount slider and may be synced to a host tempo within a DAW for more creative sound design and mixing effects.

Fold also ships with a number of professionally designed presets that showcase the versatility of its engine.


  • Hard and Soft Clip Distortion Morphing
  • Wavefolding
  • Bit Crushing
  • Analog Low and High Pass Filter Emulations
  • Four Syncable LFOs with Mappable Phase Reset Buttons
  • Local Mix Sliders on Each Module
  • Three LFO Waveform Types
  • Mono and Stereo Processing
  • Switchable Oversampling
  • Factory and User Presets
  • On/off buttons for Drive, Fold, Crush, and Low Pass filter sections
  • Local mix sliders for Drive, Fold, Crush, and Low Pass filter sections
  • Drive/Fold Link button to allow concurrent use of both parameters with one slider
  • FX is now a true Dry/Wet control
  • Envelope follower to control FX amount relative to the peak amplitude of the audio input
  • Hard sync/phase lock for LFO sections
  • Visual feedback for LFO rate
  • Oversampling factor UI
  • Output volume graphical UI slider
  • Stereo spread feature for use with true stereo inputs

System Requirements

  • MacOS 10.13 High Sierra and above
  • Windows 10 and above (32 and 64-bit)
  • Intel, AMD, or Apple Silicon CPU

Plugin Formats

AAX Native, AU, VST3

User Manual