Earthquaker Data Corrupter

A PLL Machine Inspired by Early "Frequency Synthesizers"

The Data Corrupter follows in the tradition of PLL (Phase-Locked Loop) effects that have become iconic for their unique way of "locking" the pitch of a note and generating synthesized frequencies from there. Here, the core of the circuit is based on a CMOS PLL and a decidedly analog approach: the signal is first aggressively pushed into a square wave fuzz, then multiplied, divided, and modulated to create rich harmonics and behaviors that can be sometimes tame, sometimes downright uncontrollable. In terms of DNA, the design claims inspiration from historical devices and concepts like the Electrax Synthax and Ray Marston's "Basic Frequency Synthesizer," adapted to offer more usable tracking and longer sustain on a guitar.

Who Is It For, Which Styles, and In What Context?

The Data Corrupter is aimed at guitarists (and pedalboard tinkerers) who want to break new ground: alternative rock, noise, stoner, indie, post-rock, experimental music, but also any situation where you seek an analog synth tone without letting go of your guitar. In the studio, it excels at doubling a line with a massive lower octave, creating "video game" leads or dissonant textures. Live, it becomes a weapon for transitions and impact, provided you embrace its character: the pedal is monophonic and loves simple, cleanly played lines.

For a more stable result, place it near the beginning of the chain, before delays, reverbs, and modulations. Playing isolated notes with precise attack favors fast tracking; conversely, chords and sloppy playing trigger a degree of chaos (often musical, always spectacular). A neck pickup generally provides the best tracking results.

Controls, Programs, and 3-Voice Mixing

The concept is simple: three voices, a mixer, and interval programs. The Master Oscillator voice is the brain of the pedal. It starts with a 3-position Root selector (Unison, -1 octave, -2 octaves) that adapts the tracking range to your instrument, then an 8-program rotary selector chooses the octave and/or synthesized interval. You then adjust its volume via the Oscillator knob in the Voice Mixer section.

The Subharmonic section generates a selectable low harmony via 8 programs, covering a range from one to three octaves below depending on settings. Its Root switch (Unison / Oscillator) profoundly changes behavior: in Unison, the subharmonic is more stable and frequency modulation does not affect this voice; in Oscillator, the Subharmonic "follows" the master oscillator more closely and can become wilder, with harmonic addition/subtraction interactions.

The Frequency Modulator adds pitch movement to the master oscillator: in Glide mode, you get portamento between notes (with adjustable speed via the Rate control); in Vibrato mode, the pitch oscillates up and down for a deliberate sci-fi effect. Finally, the third voice, Square, blends a square wave fuzz at the original octave, perfect for thickening the attack and dirtying the "synth."

All is shaped in the Voice Mixer section (levels for Oscillator, Subharmonic, and Square), then finalized with Level, the overall output volume. Result: you go from a simple octave reinforcement to a cyberpunk frequency wall in a quarter turn.

The Sound

Expect a very distinctive signature: a nervous square wave fuzz, an organic "synth" side, and a response that can be ultra-expressive if you play cleanly. The Data Corrupter does not seek transparency: it "recodes" your signal, with metallic harmonics, tracking artifacts, and interval beating that recall both certain analog sounds and 8-bit textures, depending on voice mixes and chosen programs.

It is also particularly touch-sensitive : attack, note cleanliness, and position on the neck directly influence perceived stability. To place its playground, it is used by musicians and sound designers known for their sonic curiosity, such as Lee Ranaldo, Matt Pike, Jeff Tweedy, or Andrew Huang, proving that this pedal is as much a riff tool as a texture and experimentation device.

• Relay switching requires power to let the signal pass through
• Do not use a higher voltage

Technical specifications

Effects	Octaver / Harmony, Distortion / Overdrive / Fuzz	Type	sector
Technology	Analog	Use	electric guitar
Format	Pedal	Color	Black

Operation	monophonic	Flexi-Switch technology	relay-based true bypass
3-voice generation	Master Oscillator, Subharmonic, Square fuzz	Two operating modes	latching (standard on/off) or momentary (active as long as the footswitch is held down)
Master Oscillator	rotary selector with 8 programs (intervals across several octaves)	Input impedance	1 MOhm
Subharmonic	rotary selector with 8 programs (low intervals)	Output impedance	less than 1 kOhm
Frequency Modulator	2 modes (Glide / Vibrato)	Dimensions	144 x 121 x 57 mm (including knobs)
Voice Mixer	Oscillator, Subharmonic, Square volume controls	Included accessories	box, documentation
Level	overall output volume	Required power supply	9V DC, center-negative, 2.1 mm connector
Input	6.35 mm jack	Current draw	26 mA
Output	6.35 mm jack