befaco-iroi

Befaco Iroi

Compact stereo atmospheric processor — filter, VCA, resonator, echo, ambience.

18 HP Eurorack module

Iroi is the right half of Befaco's Oneiroi distilled into 18 HP — a stereo effects module that turns any external signal into a deep, evolving soundscape. Five processors run in series (multimode filter, digital VCA, 3-band resonator, 2-tap ping-pong echo, Schroeder-style ambience) with the Filter-VCA block repositionable anywhere in the chain. An internal modulation source (7 shapes), a parameter randomizer with smooth-morph, and 4 mappable CV inputs make the module fully voltage-controllable, with all settings saveable to nonvolatile memory.

Features

  • OWL3-based DSP — 24-bit / 48 kHz stereo path with 32-bit internal processing
  • Five effect units in series: multimode filter → digital VCA → 3-band resonator → 2-tap stereo echo → Schroeder-style ambience
  • Filter-VCA block can be moved to one of four positions in the chain (SHIFT + Resonance)
  • Multimode filter with low-pass / band-pass / high-pass / comb modes (SHIFT + Cutoff)
  • Built-in chaotic noise generator activates at >75% resonance
  • Resonator self-oscillates at 100% feedback; Dissonance control modifies harmonic ratios
  • 2-tap ping-pong echo (10 ms to 6 s) with built-in DJ-style filter (SHIFT + Density)
  • Reverse-reverb mode when Spacetime is below 50%
  • Auto-pan with 16 selectable ratios up to 8x base frequency (SHIFT + Spacetime)
  • 7 internal modulation shapes: Chaos, Sine, Ramp, Saw, Square, S&H, Envelope Follower
  • Modulation routable to any knob-controlled parameter via the MAP system
  • External CV mapping system: 4 mappable CV inputs assignable to any primary or SHIFT-secondary parameter

Controls & Jacks (36)

  • In L (Mono)
  • In R
  • Filter VCA Level CV In
  • Reson Dry/Wet CV In
  • Echo Dry/Wet CV In
  • Ambience Dry/Wet CV In
  • Sync In
  • Out L
  • Out R
  • Random Gate In
  • Filter Cutoff CV In
  • Resonator Tune CV In
  • Sync LED
  • Filter Cutoff
  • Resonator Tune
  • Peak LED
  • Modulation Level
  • Filter Resonance
  • Resonator Feedback
  • Modulation LED
  • Echo Density CV In
  • Ambience Spacetime CV In
  • Modulation Speed
  • Echo Density
  • Ambience Spacetime
  • Echo Repeats
  • Ambience Decay
  • Shift
  • Mapping Source
  • Filter VCA Level
  • Reson Dry/Wet
  • Echo Dry/Wet
  • Ambience Dry/Wet
  • Mapping LED
  • Random
  • Map

How-To Guides

  • Stereo ambient pad from a mono drone
  • Sync-locked dub-style ping-pong delay
  • Self-oscillating resonator as a voice
  • Generative texture via the parameter randomizer
  • Reverse-reverb hits via Spacetime under 50%

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

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