Permutation (12hp)


Out of stock

SKU: grayscale_.Permutation 12hp black Maker: Types: , , ,


Black panel version:

– a random sequencer based on the Turing Machine

Permutation is a set of random sequencers that use a digital shift register to generate unpredictable CV and gate patterns that can be locked into repeating loops. The concept is based on the Turing Machine, an open source module designed by Tom Whitwell.

Permutation retains the core functionality of the Turing Machine while adding new features such as dedicated outputs for each bit of the shift register, CV inputs for all parameters, and an internal bipolar VCA. Locked sequences are also saved across power cycles.

Variant is an expander module based on the original Voltages expander for the Turing Machine. Variant adds two additional bipolar CV outputs (with modulation inputs) that are derived from Permutation’s gate sequence.


User Manual Version 1.1 covers all features of Permutation and Variant.


  • 48 mA +12V
  • 14 mA -12V
  • 0 mA 5V
  • 40 mm deep

Click here for aluminium silver panel version

Permutation Comparisons

Each version of Permutation has a slightly different set of features. The 6hp version has an assignable CTRL input. Holding the Clear/Write switches down for a few seconds assigns the CV input to Shift, Bits, or Amp (the internal VCA).

Size 18hp 12hp 6hp
Sequence CV output Yes Yes Yes
Inverted sequence CV output Yes No No
White noise output Yes Yes No
Clock output Yes No No
Gate outputs 16 8 1
Bipolar VCA Yes Yes Assignable
Pause/Clock switches Yes No No
Clear/Write switches Yes Yes Yes
Clear/Write CV inputs Yes No No
+12V current draw 48 mA 48 mA 48 mA
-12V current draw 14 mA 14 mA 14 mA



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