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Ritual Electronics Crime II

¥21,900 (Tax excluded ¥19,909)
Expander to add diode change panel control and LP/HP filters to Miasma

Format: Eurorack
Width: 4HP
Depth: 25mm
Current: 9mA @ + 12V, 7mA @ -12V

Manual Page


By connecting a Crime expander to the Miasma, you can choose from 6 different diode combinations that determine the timbre of the distortion.It also adds active lowpass and resonant highpass filters to Miasma's core. 


Connection with Miasma

  1. Remove all the diodes installed in the header on the back of Miasma (fig.I).
  2. Connect the male end of the included cable to the Miasma header.Connect so that the black stripe of the cable is on the bottom (fig.II).
  3. Connect the opposite end of the cable to Crime's header.Make sure the black stripes are facing the same direction (fig.II).

Five diode combinations can be selected using the 'Diodes' rotary switch at the top.Some offer symmetrical, some asymmetrical distortion.

Also, the 'Ⅵ' position corresponds to Crime's header, and any diode can be attached and used.If you do not attach a diode to this header, you can get intense distortion.

A low-pass filter in the distortion core can suppress high frequencies, especially when the Miasma's feedback starts chirping.A slightly resonant high-pass filter can be used to process low-end or create piercing noise.

To connect Crime, remove the diode on Miasma's header and use the included cable.This eliminates the need to remove the Miasma from its case when changing diodes to explore new distortion sounds.

Note that the voltage drop is different for each diode, increasing or decreasing the resulting output level.You can use Miasma's Level trimmer for level correction.


Miasma uses two diodes to rectify the signal.These diodes define the character of the sound.

It changes the shape of the distortion created by the diode.Asymmetric distortion is obtained by using one diode for each polarity of the waveform.Diodes affect the sound of distortion, the texture of feedback, and the pitch.Different diodes consume different currents and voltages, so the configuration will increase or decrease the output level.

Crime uses 5 different diodes.

diodesIn the encoder 'Ⅵ' position, you can use any diode attached to Crime's header or play it unconnected.

These diodes are arranged in 'volume' order. Moving from position 'I' to position 'V' decreases the voltage drop across the diode, making the resulting sound progressively louder.

Diode configuration
  • I: 3x 1N4148, asymmetrical
  • II: 2x 1N4148
  • III: 3x BAS20
  • IV: 1x 1SS390
  • V: 3x Blue LEDs

Low pass

The lowpass filter changes the corner frequency by switching the distortion gain cell capacitors and changing the capacitor values.This filter is useful when the Miasma's feedback starts chirping, or when you want to dampen high frequencies like the Tone knob on a distortion pedal.

  • I: No capacitors, no filtering, natural sound
  • II: Filtered at 3.6kHz
  • III: Filtered at 2.7kHz
  • IV: Filtered at 1.4kHz
  • V: Filtered at 1kHz
  • VI: filtered at 660Hz

High pass

The highpass filter switches resistance in a special resonant highpass circuit.The amount of resonance is frequency dependent.In other words, the higher the position of the switch, the stronger the resonance.Depending on the input signal and feedback settings, the filter may self-oscillate.

  • I: Natural sound without filtering
  • II: filtered at 75Hz
  • III: filtered at 175Hz
  • IV: filtered at 375Hz
  • V: filtered at 555Hz
  • VI: filtered at 666Hz

Crime output

Crime is connected to Miasma's first gain stage, where the diode is.The signal is then colored by going through several other gain stages and finally entering a blend circuit. Use the Crime output if you don't want to be characterized by these circuits.This output eliminates all decorations and focuses on raw, violent and gritty signals.
It is also possible to get a 20Vpp signal at this output, depending on the diode combination chosen and the input signal used.