2hp-euclid

2hp Euclid

Euclidean rhythm generator with CV over length and fill density.

2 HP Eurorack module

Euclid is a 2HP Euclidean rhythm generator. Feed it a clock and it distributes a chosen number of "hits" as evenly as possible across a step pattern of a chosen length, producing the cyclical rhythms found in folk music worldwide and now woven through electronic music. Three knobs — LENGTH (1–16 step pattern), STEPS (how many of those steps are active), and OFFSET (rotation around the bar) — give immediate musical control, with CV over LENGTH and STEPS for evolving patterns. A RESET input forces the pattern back to step 1 for tight musical alignment.

Features

  • Euclidean pattern generator
  • 1 to 16 step pattern length
  • Active-step (fill) control with even distribution
  • Pattern rotation via OFFSET knob
  • CV over pattern length (0 to +5 V)
  • CV over active-step count (0 to +5 V)
  • External clock advances pattern
  • Hard reset input returns to step 1
  • +5 V, 6 ms trigger output
  • Output activity LED
  • 2 HP, 42 mm depth, skiff-friendly
  • Low power: 21 mA +12 V / 2 mA -12 V

Controls & Jacks (9)

  • TRIG In— Clock/trigger input — each pulse advances the Euclidean pattern by one step.
  • RESET In— Reset input — a trigger here returns the Euclidean pattern to step 1.
  • LENGTH CV In— CV input for pattern length (0 to +5V). Voltage adds to the LENGTH knob position.
  • STEPS CV In— CV input for active step count (0 to +5V). Voltage adds to the STEPS knob position.
  • LENGTH— Sets total pattern length from 1 (fully left) to 16 steps (fully right). Sums with LENGTH CV In.
  • STEPS— Sets number of active steps distributed across the pattern. Scaled to current LENGTH: fully left = 1 hit, center = half-fill, fully right =
  • OFFSET— Rotates the pattern around the bar. Fully left = no offset; fully right = offset by LENGTH-1 steps. Useful for shifting the downbeat without
  • OUT LED— Green LED — lights when the OUT jack fires a trigger on an active step.
  • OUT— +5V trigger output. Fires a 6 ms pulse each time the Euclidean pattern lands on an active step.

How-To Guides

  • Classic 8/3 Tresillo
  • Cinquillo Hi-Hat (16/5)
  • Interlocking Polyrhythm with Two Euclids
  • Evolving Fill Density with LFO
  • Odd-Time Pattern with Hard Reset

Explore the interactive Euclid panel on BleepDex — tap any control to learn what it does.

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