Krach Manual


Always turn your eurorack case off before plugging or unplugging a module.

Do not touch any electrical terminals when attaching any Eurorack bus board cable.

Ritual Electronics Krach requires:

  • 26 mA +12V
  • 26 mA -12V
  • 0 mA 5V

You will need 6HP of free space in your Eurorack case to install Krach. As it’s a 1U module, you will need 1U rack space, in Intellijel format. Please refer to either manufacturer website for complete specifications on their respective format.

As the 1U series does not have a shrouded header, all the modules will be follow the RED STRIPE DOWN norm. Just align the red stripe on your power cable to the line on the module with RED written next to it. Connect the other end of the cable to the bus board connector of your case.


Noise and more noise…
Krach is 4 channels of noise

Krach generates analog white noise. It generates three additional noise colors from it.

Pink noise is derived from it with a 3dB/Oct low pass filter.

Hiss noise is obtained from white noise using a slightly resonant high pass filter.

Rumble is created from pink noise with the help of a very low pass filter.

The additional noises are great to create percussion, natural textures, noise walls and more sound design greatness.

Technical characteristics

  • Analog white noise generator
  • Filtered noise outputs


  • 35 mm deep
  • 6HP large
  • 1U


A – White Noise Out
Analog transistor based white noise

B – Pink Noise Out
3dB/oct low pass filter on white noise

C – Hiss Out
Resonant high pass filtered white noise

D – Rumble Out
Low pass filtered pink noise

Noise colors

White noise

White noise has a flat frequency distribution.

Pink noise

Pink noise has a -3dB/Oct low pass filter. Our ear perceive it as “neutral”


Hiss is white noise with a 6dB/oct resonant high pass at 14kHz.


Rumble is pink noise with an extra low pass filter cutting around 100Hz with a gentle slope.

Patch Ideas

Patch #1 – New colors

The different outputs are out of phase. Which means by mixing them, even passively, you can obtain new colors of noise. Add some VCA in there for animation and you’ll have a great drone of textures

Patch notes

Krach, White out ———— Mixer, in I
Krach, Pink out ———— Mixer, in II
Krach, Hiss CV ———— Mixer, in III

Patch #2 – Fireplace & random gates

Use one of the noise outputs and process it with a comparator.
Start with a high threshold and back it down slowly to hear the first crackles of the fire. This technic can work for audio or to generate random gates.

Use an LFO or enveloppe to change the density of the gates or he blaze size.

Patch notes

Krach, Noise out ———— Comparator, input
Comparator, out ———— Audio / Gates
LFO, out ———— Comparator, CV

Patch #3 – Tuned noise

One of the easy way to achieve tuned noise is to FM an oscillator with noise. Tune your oscillator to the desired frequency and adjust the FM. As easy as that.

Try different noise colors and different waveform outputs from you oscillator.

Patch notes

Krach, White out ———— Oscillator, FM in
Oscillator, Waveform out ———— 

Patch #4 – 220V synth

Oscillators tend to sound a bit dull in a distortion, compared to a guitar let’s say. But if you add a generous dose of noise before the saturation, you will have a somehow electric sound, breaking the monotony of the ever repeating waveform of your oscillator. It works great with the Hiss output.

Patch notes

Oscillator, Saw out ———— Mixer, Ch. 1 In
Krach, Hiss out ———— Mixer, Ch. 2 In
Mixer, Out ———— Guillotine, In L


Thank you for purchasing Ritual Electronics Krach.
Your module has been assembled with care in Marseille, France.

You can find your module on Modulargrid:

For any remarks and informations, contact us at:

For video demos and patch ideas check:

Limited Warranty

Ritual Electronics warrants this product to be free of defects in materials or construction for a period of one year from the date of purchase. Malfunction resulting from wrong power supply voltages, backwards or reversed eurorack bus board cable connection, abuse of the product or any other causes determined by Ritual Electronics to be the fault of the user are not covered by this warranty, and normal service rates will apply.
During the warranty period, any defective products will be repaired or replaced, at the option of Ritual Electronics, on a return-to-Ritual Electronics basis with the customer paying the transit cost to Ritual
Electronics. The return of your module is on us.
Ritual Electronics implies and accepts no responsibility for harm to person or apparatus caused through operation of this product.