Mutable Instruments Plaits Manual (PDF/manual page)
Plaits is a very flexible macro-oscillator voice for Eurorack, and based on this manual, it can serve as the core melodic sound source in several different ways: as a conventional pitched oscillator, a chord generator, a plucked/struck physical model, a wavetable lead, or even a speech-like melodic texture.
Plaits contains:
That means it can function either as:
For melody writing, the strongest Plaits models are:
Great for:
Controls: - HARMONICS: detune between the two waves - TIMBRE: pulse shape / hardsync formants - MORPH: saw/triangle/notch variation
How to use melodically: - Send a sequencer or keyboard into V/OCT - Send gates/triggers into TRIG - Use the internal LPG for instant articulation - Modulate TIMBRE or MORPH slowly for evolving lead lines
This is probably the easiest “traditional synth voice” inside the module.
Great for:
Controls: - HARMONICS: waveshaper waveform - TIMBRE: wavefolder amount - MORPH: waveform asymmetry
How to use melodically: - Patch pitch CV to V/OCT - Trigger the internal envelope via TRIG - Add slow CV to TIMBRE for movement across phrases - Use AUX as an alternate folded tone for layering or parallel processing
This model works well when you want melodic material that feels more modern and harmonically rich.
Great for:
Controls: - HARMONICS: frequency ratio - TIMBRE: modulation index - MORPH: feedback/chaos character
How to use melodically: - Keep MORPH near noon for more stable pitched tones - Sequence pitch via V/OCT - Use light CV on TIMBRE to animate note brightness - Use AUX sub output to reinforce the fundamental for bass melodies
This is one of the best models for melodic lines that need more harmonic complexity without losing pitch definition.
Great for:
Controls: - HARMONICS: spectral bump count - TIMBRE: center harmonic - MORPH: bump shape
How to use melodically: - This model responds very musically to subtle modulation - Use it for tonal sequences where each note should remain clear - The AUX output gives a Hammond-like subset of harmonics, useful for second-layer melody doubling
This is a good choice when you want melody without too much harshness.
Great for:
Controls: - HARMONICS: bank selection - TIMBRE: row - MORPH: column
How to use melodically: - Sequence notes into V/OCT - Modulate TIMBRE and/or MORPH with slow LFOs, random, or envelope CV - Use AUX low-fi output for a doubled or contrast voice
This model is especially useful when the melody should change tone over time without changing pitch.
Excellent for melodic-harmonic writing.
Controls: - HARMONICS: chord type - TIMBRE: inversion/transposition - MORPH: waveform selection - AUX: root note
How to use musically: - Send 1V/Oct to V/OCT to transpose the entire chord - Trigger with TRIG - Sequence chord changes as if Plaits were a harmonic voice - Use AUX root output separately as: - a bassline source - pitch reference - doubled melody
This is one of the most powerful “melodic component” tools in the module because a single pitch CV line can become full harmonic movement.
Useful for:
Controls: - HARMONICS: vowel/speech algorithm/word bank - TIMBRE: species/formant shift - MORPH: phoneme or word segment
Musical use: - Sequence pitch melodically for “singing synth” effects - Trigger words/segments with TRIG - Use CV over MORPH to scan phonemes rhythmically - Use FM attenuverter to affect intonation when triggered
This is less conventional, but very effective for melodic ear candy or top-line motifs.
Great for:
Controls: - HARMONICS: inharmonicity/material - TIMBRE: excitation brightness - MORPH: decay
How to use melodically: - Send note CV to V/OCT - Send gates/triggers to TRIG - Let the internal exciter and decay shape each note - Use LEVEL as accent input for more expressive phrasing when using triggered physical models
These models are especially strong for melodic sequences that need natural attack and resonant decay.
One of the most important melodic features in Plaits is that you do not always need an external envelope + VCA.
Plaits can: - trigger its own decaying envelope - strike its internal LPG - excite physical/percussive models - sample-and-hold model CV
This means a minimal melodic patch can be:
That alone creates a playable melodic voice.
For melodic composition, this makes Plaits ideal for:
The manual notes that when a corresponding CV input is unpatched and TRIG is patched, the attenuverters for TIMBRE, FM, and MORPH control the amount of internal envelope modulation.
This is extremely useful for melody because it gives you note-by-note timbral articulation without extra patching.
For example: - internal envelope to TIMBRE = brighter attack on each note - internal envelope to MORPH = shape changes per note - internal envelope to FM = pitch sweep or transient movement
This is a major feature for expressive melodic phrasing.
Use: - virtual analog, waveshaping, or FM model
Patch: - pitch sequencer → V/OCT - gate/trigger sequencer → TRIG - OUT → mixer/filter/effects
Technique: - use internal LPG - set moderate decay - assign internal envelope to TIMBRE with attenuverter for dynamic attack brightness
Result: - expressive lead line with minimal patching
Use: - string/resonator model
Patch: - sequencer → V/OCT - triggers → TRIG - OUT → reverb/delay
Technique: - short to medium decay - increase excitation brightness with TIMBRE - use LEVEL CV for accents on selected notes
Result: - melodic plucks, kalimba-like lines, or modal sequences
Use: - chord model
Patch: - sequence → V/OCT - gates → TRIG - OUT → main mixer voice - AUX → separate bass processing chain
Technique: - OUT carries full chord sound - AUX gives root note, which can become a bass component - tune waveform with MORPH - animate inversion using TIMBRE
Result: - harmonic and melodic content from one module
Use: - wavetable or additive model
Patch: - arpeggiator/sequencer → V/OCT - triggers → TRIG - slow LFO/random → TIMBRE or MORPH
Technique: - keep pitch sequence simple - let timbre modulation create variation - use AUX as contrasting secondary texture
Result: - melodic line that evolves without becoming harmonically unclear
Use: - FM or virtual analog model
Patch: - bass sequencer → V/OCT - gate → TRIG - AUX sub or alternate output mixed with main out
Technique: - use AUX sub to support low end - keep LPG response tighter and more VCA-like if you want punch - shorter decay for rhythmic articulation
Result: - bassline with both definition and body
Use: - speech model
Patch: - melodic CV → V/OCT - trigger sequence → TRIG - slow/stepped CV → MORPH
Technique: - scan phonemes or words while notes change - use reverb or delay after the module - automate TIMBRE for different “vocal characters”
Result: - unusual melodic hooks and vocal-style motifs
A big compositional strength of Plaits is the relationship between OUT and AUX.
Depending on the model, AUX may be: - a sub oscillator - another timbral variant - a low-fi version - a raw exciter - a root note - filtered/noisy complement
This allows several melodic strategies:
Mix OUT and AUX together for a fuller lead.
Send: - OUT to main melodic chain - AUX to another filter/VCA/effect path
On the chord or FM models, AUX can support the root or sub while OUT carries the more complex upper content.
Use different effects on OUT and AUX: - dry OUT + wet AUX - distorted AUX + clean OUT - mono center OUT + stereo FX AUX
You can narrow the coarse tuning range to 14 semitones around a fixed octave instead of the full 8-octave span.
This is very helpful for melodic work because: - fine tuning is easier - live pitch adjustment is safer - it behaves more like a conventional oscillator tuning control
To do this: - hold the second model button - turn HARMONICS to select the range
For melodic systems, this is one of the first settings worth changing.
You can adjust the internal low-pass gate from: - VCFA-like response to - VCA-like response
For melody: - more VCFA = plucky, organic, darker tail - more VCA = more neutral, direct articulation
If you want clean sequenced melodies, move it more toward VCA. If you want West Coast plucks or softer note edges, stay more toward VCFA.
Adjustable with the button + MORPH combo.
For melody: - short decay = basslines, staccato sequences, arps - medium decay = leads, plucks - long decay = ambient lines, overlapping phrases
The model CV input can be modulated, and if TRIG is patched, model changes happen only when a trigger is received. That means you can switch synthesis model on note boundaries.
Musically, this allows: - verse lead on one model, chorus lead on another - alternating timbres every step - controlled phrase-by-phrase variation
Because model changes can be sampled on triggers, it can stay rhythmically coherent.
For physical/percussive models, LEVEL acts as an accent control when TRIG is patched.
This is great for: - melodic percussion - expressive plucked sequences - more human phrasing in repeating melodic patterns
Instead of only opening amplitude, use the unpatched CV attenuverters to route the internal envelope to timbre-related parameters.
This gives each note: - a brighter start - a pitch transient - a shape sweep
That makes simple sequences sound much more musical.
Use when you want: fast patching, clear melody
Use when you want: sparse melodic ambience
Use when you want: instant musical structure from one voice
Use when you want: animated, modern melodic motion
Use when you want: bellish or electric melodic hooks
Plaits is exceptionally strong for melodic duties because it combines:
In practice, Plaits can cover:
If you are building melodic patches, the most immediately useful models are: - virtual analog - FM - wavetable - additive - chord - resonator/string
And the single most important trick from the manual is this:
With TRIG patched and the timbre CV inputs left unpatched, the attenuverters can apply the internal envelope to timbre parameters, giving every note built-in melodic expression.
That makes Plaits not just a sound source, but a very complete melodic voice.