Subdecay Noise Theory

The Subdecay Noise Theory is a hybrid multi-fuzz pedal that blends an analog-voiced fuzz with a digital fuzz running in parallel, using wave folding and wave shaping circuits borrowed from synthesizer design. Where a classic fuzz pedal clips your signal, the Noise Theory reshapes it: wave folding folds the tops of the waveform back into the waveform, generating higher harmonics and, at extremes, harsh white-noise textures¹. Subdecay describes the pedal as "Unconfined by 60's and 70s tradition, it embraces synth technology like wave folding and wave shaping distortions."²

The pedal carries a list price of $199.00 direct from Subdecay³.

Fuzz types and chorus/flange settings

The digital side of the pedal offers 11 fuzz types, selected with the Fuzz Type control. Guitar Pedal X's review lists them as follows¹:

Fuzz Type 0, Square Fuzz, is the most conventional of the set: Subdecay says it "amplifies the signal until it reaches its limits, resulting in squared-off peaks and valleys," which is close to how a traditional fuzz circuit behaves². The rest of the range moves into wave folding and wave shaping territory, with names like Harmonic Ripple Wave Folder and Wave Smasher pointing at textures a standard fuzz pedal does not produce.

Beyond the fuzz types, the pedal includes a chorus and flange option with its own settings. Guitar Pedal X's review describes it as 0 for off, with settings 1 to 10 covering different chorus and flange sounds: 1 and 5 are higher-level oscillation with a rotary sort of character, 2 to 4 are flangers (4 being a jet flange), and the remainder are mostly different styles of chorus¹. That puts modulation duties normally handled by a separate chorus or flanger pedal inside the same box.

Presets and MIDI control

The Noise Theory stores 11 savable presets, numbered 0 to 10, selectable from the pedal's own controls²¹. Editing is split across modes, and Guitar Pedal X's review breaks the control set down like this¹:

In Shaper mode, the third top dial becomes a secondary bias control, which the review notes can introduce a secondary octave of sorts into the output¹. The Gain control in shaper edit mode "Controls the overall gain of the waveshaper fuzz," per the maker's user guide⁶.

MIDI is where the pedal opens up. Its 30-plus parameters can be controlled via MIDI and edited in depth through a free app⁵, and in the pedal's synthesizer mode all parameters are controllable via MIDI in real time¹. Subdecay's own buying guide notes that "The Noise Theory Fuzz even has a built in MIDI synthesizer if you are into that sort of thing," which places it among the more unusual synth pedals on the market⁷.

What wave folding fuzz sounds like

Because the analog and digital fuzz circuits run in parallel, the Noise Theory is not a single fuzz voice but a blend: the analog side holds the familiar fuzz character while the digital side folds waveforms on top of it. Guitar Pedal X called it "very much a Multi-Fuzz unit which folds in digital waveforms in parallel to an Analog voiced fuzz"⁴. Delicious Audio's roundup of unusual fuzz pedals describes it as "A dual fuzz that blends an analog and a digital fuzz, employing radical-sounding Wave Folding and Wave Shaping circuits on the digital side, through 10 different algorithms"⁵.

For a player used to silicon or germanium fuzz circuits, the wave folder types behave differently: instead of clipping the signal flat, they turn the peaks back on themselves, which stacks harmonics in ways that can get noisy and metallic at extreme settings¹.

What reviewers said

Guitar Pedal X's review was positive about the sound but critical of the interface. On the downside, the reviewer wrote that "Secondary functions and the flashing Edit LED make operation clunky," adding that the reviewer is rarely a fan of multiple secondary and tertiary functions on the same controls¹. The hardware knobs cover Tone, Compression, HPF and LPF plus preset navigation, with the deeper editing pushed to the app and MIDI⁵.

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