Key data

Texture synthesizer

Parameter Value
Width 34HP
Depth 25mm
+12V current 130mA
-12V current 10mA
Lifetime 01/15 to 01/22
Modulargrid Link
Processor STM32F405RGT6 @ 168 MHz
Codec WM8731

Original printed manual

PDF download


Excitation signal generator

  • Three generators with mixer: bowing noise, blowing noise, percussive impulses.
  • Envelope contour for bowing and blowing.
  • Bowing noise generator: particle-like scratching noise with 2-pole low-pass filter.
  • Blowing noise generator: granular pitched noise with wavetable-like scanning between various tone colors.
  • Percussive impulse generator: interpolates through a collection of impulsive excitations – including sampled sticks, brushes and hammers, and models of damped mallets, plectrums, or bouncy particles. 2-pole low-pass filter and pitch control.
  • Internally uses 64 zero-delay feedback state variable filters.
  • Coarse, fine and FM frequency controls.
  • Geometry: Interpolates through a collection of structures, including plates, strings, tubes, bowls.
  • Brightness. Specifies the character of the material the resonating structure is made of – from wood to glass, from nylon to steel.
  • Damping. Adds damping to the sound – simulates a wet material or the muting of the vibrations.
  • Position. Specifies at which point the structure is excited.
  • Space. Creates an increasingly rich stereo output by capturing the sound at two different points of the structure, and then adds more space through algorithmic reverberation.

Designed for Eurorack

  • All exciter and resonator parameters have a dedicated CV input with attenuverter.
  • Strength input, for amplitude control of the exciter section.
  • Frequency control through a V/O input controlling the main resonator frequency, and an FM input.
  • Two audio inputs: one pre-envelope and diffuser, the other patched straight to the resonator.
  • Stereo audio output, with adjustable width/reverberation. It is also possible to output the raw exciter signal on one channel, and the raw resonator signal on the other.


  • Input impedances: 100k.
  • CV range: +/- 8V. CVs outside of this range are simply clipped.
  • Audio input level: calibrated for modular (10 Vpp).
  • Audio acquisition and restitution: 16-bit, 32kHz.
  • Internal computations on 32-bit floating point numbers.

Revisions and variants


Hardware revision labelled "v0.3" with minor manufacturability improvements, such as dimensions of PCB pads and holes.