alm-mco-mkii

ALM Busy Circuits MCO mk II

6HP digital multi-voice synth: 8 engines, chords, mod matrix, color UI.

6 HP Eurorack module

The MCO mk II is ALM Busy Circuits' 6HP digital VCO/voice module — a sequel to the original MCO that expands the format from one engine to eight selectable voice programs. DigiWave (wavetable), ToneSum (12-sine additive), BC8000 (JP-style multimode synth with supersaw / triangle-mod / noise / feedback), Sylon (vocoder/FFT-reconstructor), Virtana (90s VA dual-osc), Oomph (kick/bass synth), SID Guts (C64 SID emulation), and AEIOU (vocal/phoneme synthesis) each produce a distinct sonic category. A built-in modulation matrix routes 3 freely-assignable CV inputs, 3 internal LFOs (10 shapes), and a switchable AD/ADSR envelope into any parameter, with per-assignment attenuation and offset. Global pitch (octave/semitone/cents/scale) and global chord (12 standard + 4 detune + 4 user) sit on top of every voice. 32 user preset slots are shared across all voices; presets can be loaded under external CV control for live performance.

Features

  • 8 voice engines: DigiWave, ToneSum, BC8000, Sylon, Virtana, Oomph, SID Guts, AEIOU
  • 6 HP, color graphical UI driven by one rotary encoder + Back button
  • Global Pitch page: Octave / Semitone / Cents / Scale (quantized output)
  • Global Chord: 12 standard + 4 unison detune + 4 user-definable chord shapes
  • 3 freely-assignable CV inputs (0–5V) routed via on-screen mod matrix
  • 4th assignable CV available when Trig In is set to CV mode
  • Per-assignment digital attenuation + offset on every modulation route
  • 3 internal LFOs (10 shapes: Square, Rising Saw, Falling Saw, Triangle, Sine, Trapezoid, Expo, Log, Random, Glide; modes: Free / Retrig / One-Shot)
  • Switchable AD or ADSR envelope into VCA
  • Trig In mode: Trig / Gate / VCA CV / CV — with cable-presence detection
  • 32 user preset slots shared across all voices (loadable via external CV)
  • Quick mod-source assign: hold Back + twist Encoder

Controls & Jacks (11)

  • V/Oct In
  • Ext In
  • Trig In
  • CV 1 In
  • CV 2 In
  • CV 3 In
  • Display
  • Back
  • Encoder
  • Out A
  • Out B

How-To Guides

  • DigiWave wavetable bass
  • ToneSum metallic bell
  • Sylon vocoder
  • Oomph 808-style kick
  • Live CV-controlled modulation matrix
  • CV-controlled preset loading (live mode)
  • AEIOU phoneme morph

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

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