instruo-cruinn

Instruo Cruïnn

Analogue stereo oscillator with through-zero phase modulation

14 HP Eurorack module

The Instruo Cruïnn is an analogue stereo oscillator built around a single sawtooth core that produces six parallel phase-displaced sawtooth variants. Five internal triangle-wave LFOs independently modulate the phase of each variant, creating super-saw textures, lush stereo pads, phaser-like basses, and chaotic effects. A built-in stereo VCA with soft-clipping saturation provides amplitude control, and both linear and exponential FM inputs are available. The module includes a passive 4HP expander for individual waveform outputs and per-voice CV phase control.

Features

  • Analogue stereo oscillator with through-zero phase modulation
  • Single sawtooth core with five phase-displaced variants
  • Five independent internal triangle-wave LFOs for phase modulation
  • Global Rate and Depth controls for phase modulation parameters
  • CV inputs with attenuators for Rate, Depth, and Level
  • Built-in stereo VCA with soft-clipping saturation
  • Stereo outputs (Left/Right) plus mono sum (Sigma)
  • Linear and exponential frequency modulation with toggle selection
  • LFO mode for subsonic operation as complex modulation source
  • Calibrated 1V/Oct pitch input
  • Soft clipping limits output to ~10Vpp preventing hard clipping
  • Rate indicator LEDs show internal LFO speeds

Controls & Jacks (20)

  • Level
  • Level CV In
  • Level CV Atten
  • Rate
  • Rate Mod CV In
  • Rate Mod CV Atten
  • Depth
  • Depth Mod CV In
  • Depth Mod CV Atten
  • Coarse
  • Fine
  • FM In
  • FM Atten
  • Lin/Exp
  • LFO
  • 1V/Oct
  • Right Out
  • Left Out
  • Sigma Out
  • Rate Indicator

How-To Guides

  • East Coast Synth Voice
  • Super Saw Pad
  • FM Synth Voice
  • Apocalypse Helicopter
  • Stereo Super Saw with Filter Modulation
  • Multi-Phase LFO Source

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

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