2hp Fold
A compact Eurorack wavefolder module released in 2016. It does analog waveform folding with CV control in just 2HP.
Overview
The 2hp Fold is a Eurorack-format analog wavefolder designed by 2hp and released in 2016. It does wavefolding and harmonic distortion in a 2HP panel, which suits a system short on space. The module processes audio signals and can go from subtle warmth to aggressive, FM-like harmonics.
The Fold has two knobs and dual inputs, so the folding effect can be set by hand or by voltage control. It is praised for its musicality and for what it does to simple waveforms, particularly when paired with wavetable oscillators or low-pass gates.
Specifications
| Width | 2HP |
| Power | +12V: 30mA, –12V: 20mA |
| Inputs | 1x audio input, 1x CV input |
| Outputs | 1x audio output |
| Controls | 1x "Fold" knob, 1x "CV Amount" knob |
Design
The 2hp Fold uses a pure analog circuit based on a simple op-amp folding core, tuned to add harmonic complexity without harsh, digital-sounding distortion. The Fold knob adjusts the intensity of the wavefolding effect, while the CV Amount knob scales the incoming modulation voltage for dynamic control.
Context
The Fold came out in 2016 as part of 2hp's effort to fit essential synthesis functions into ultra-compact panels. It was designed to compete with larger wavefolders like the Intellijel µFold and Doepfer A-137-1, offering similar functionality in a fraction of the space.
Market
The 2hp Fold is still in production as of 2023 and is widely available on the used market. Used prices typically run $80 to $100 USD. No widespread failure points have been reported, and the module is considered reliable because the analog design is so simple.
Market Value
┌──────────────────────────────────────────────────────────────────────────┐ │ 2HP FOLD Apr 2026 │ ├──────────────────────────────────────────────────────────────────────────┤ │ High $600 Latest $600 │ │ Median $130 Trend ▲ Up │ │ Low $19 Volume — │ ├──────────────────────────────────────────────────────────────────────────┤ │ $600 ┤ .│ │ │ │ │ │ │ │ $343 ┤ │ │ │ │ │ │ │ │ │. │ │ $0 ┤ . │ │ ├─────────────────────────────────────────────────────────────────│ │ vol │█ █ █│ │ └─────────────────────────────────────────────────────────────────│ │ 2023-08 2024-12 2026-04│ └──────────────────────────────────────────────────────────────────────────┘
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