Instruo Harmonaig
Four-voice diatonic harmonic quantiser for expressive chord progressions
18 HP Eurorack module
The Harmonaig is a four-voice diatonic harmonic quantiser that takes a single CV input and outputs up to four harmonically related voltages representing chord tones (root, third, fifth, seventh). It brings polyphonic chord composition and harmonic voice leading to the Eurorack format, supporting modal scales, inversions, voicings, and custom chord programming with no deep music theory knowledge required.
Features
- Four-voice diatonic harmonic quantiser with individual CV outputs for root, third, fifth, and seventh chord tones
- CV input with built-in attenuverter and bipolar input range of -/+10V (20 octaves)
- Individual slew/portamento controls for each of the four CV outputs
- Eight chord quality types: Minor Major 7th, Diminished 7th, Half Diminished, Minor 7th, Dominant 7th, Major 7th, Augmented Major 7th, Augmented Dominant 7th
- Four chord inversion settings (Root Position, 1st, 2nd, 3rd Inversion)
- Four chord voicing settings (Close, Drop 2, Drop 3, Spread/Open)
- Seven Ionian modal scale presets: Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian
- Seven Harmonic Minor modal scale presets: Aeolian #7, Locrian #6, Ionian #5, Dorian #4, Phrygian #3, Lydian #2, Super Locrian
- Automatic diatonic harmonisation assigns contextually correct chord qualities per scale degree
- Manual and CV override of chord quality via Diatonic Button
- CV inputs for Chord Quality, Inversion, and Voicing (all 0V-5V, summed with knob position)
- Transposition with three modes: Quantised Offset, Global Quantised Offset, Global Fine Tune
Controls & Jacks (31)
- CV Input — Bipolar CV input for the quantizer, range -/+10V (20 octaves)
- Transpose — Controls transposition in Quantised Offset Mode, Global Quantised Offset Mode, or Global Fine Tune Mode
- R CV Output — Root note CV output of the harmonized chord
- 3 CV Output — Third note CV output of the harmonized chord
- 5 CV Output — Fifth note CV output of the harmonized chord
- 7 CV Output — Seventh note CV output of the harmonized chord
- R CV Output Slew — Slew/portamento control for the Root CV output
- 3 CV Output Slew — Slew/portamento control for the 3rd CV output
- 5 CV Output Slew — Slew/portamento control for the 5th CV output
- 7 CV Output Slew — Slew/portamento control for the 7th CV output
- Transpose Button — Cycles through Transpose fader modes: disabled, Quantised Offset, Global Quantised Offset, Global Fine Tune
- Gate Output — Gate output that is high when a voltage is active in Performance Mode
- Inversion — Selects chord inversion: Root, 1st, 2nd, 3rd, close, drop 2, drop 3, open
- Inversion CV Input — CV input for controlling chord inversion
- Chord Quality — Selects chord quality: 7, -7, diminished, augmented, major 7th, augmented major 7th
- Voicing — Controls chord voicing and note arrangement across octaves
- Voicing CV Input — CV input for controlling chord voicing
- Diatonic — Selects diatonic mode and harmonic minor scale presets
- Chord Quality CV Input — CV input for controlling chord quality
- C#/Db — Keyboard button for C#/Db note, enables/disables this pitch in the quantized scale
- D#/Eb — Keyboard button for D#/Eb note, enables/disables this pitch in the quantized scale
- F#/Gb — Keyboard button for F#/Gb note, enables/disables this pitch in the quantized scale
- G#/Ab — Keyboard button for G#/Ab note, enables/disables this pitch in the quantized scale
- A#/Bb — Keyboard button for A#/Bb note, enables/disables this pitch in the quantized scale
- C — Keyboard button for C note, enables/disables this pitch in the quantized scale
- D — Keyboard button for D note, enables/disables this pitch in the quantized scale
- E — Keyboard button for E note, enables/disables this pitch in the quantized scale
- F — Keyboard button for F note, enables/disables this pitch in the quantized scale
- G — Keyboard button for G note, enables/disables this pitch in the quantized scale
- A — Keyboard button for A note, enables/disables this pitch in the quantized scale
- B — Keyboard button for B note, enables/disables this pitch in the quantized scale
How-To Guides
- Programming a Custom Chord
- Reset Global Transpose Offsets
- East Coast Chord Sequencer
- Live Chord Performance Keyboard
- Audio Rate Harmonic Swarm
- Evolving Modal Chord Progression
- Gate-Clocked Random Chord Colour
- Live Global Key Change
- Jazz Drop 2 Chord Comping
- Slow Attack Chord Swell
- Phrygian Dominant Middle Eastern Texture
Explore the interactive Harmonaig panel on BleepDex — tap any control to learn what it does.
