Mutable Instruments

Plaits is the spiritual successor of Mutable Instruments’ best-selling voltage-controlled sound source, Braids. Not just a mkII version: its hardware and software have been redesigned from scratch.

Just like its predecessor, it offers direct access to a large palette of easily tweakable raw sonic material, covering the whole gamut of synthesis techniques.

Thanks to additional CV inputs, and to the use of three timbre-shaping parameters per model, Plaits is straightforward to use, and much closer to the ideal of one synthesis technique = one model. What were fragmented islands of sound in Braids are now part of a continuum of sounds.

16 deep synthesis models

8 synthesis models for pitched sounds:

  • Two detuned virtual analog oscillators with continuously variable waveforms.

  • Variable slope triangle oscillator processed by a waveshaper and wavefolder.

  • 2-operator FM with continuously variable feedback path.

  • Two independently controllable formants modulated by a variable shape window (VOSIM, Pulsar, Grainlet, Casio CZ-style resonant filter…).

  • 24-harmonic additive oscillator.

  • Wavetable oscillator with four banks of 8x8 waves, with or without interpolation.

  • Chord generator, with divide down string/organ emulation or wavetables.A collection of speech synthesis algorithms (formant filter, SAM, LPC), with phoneme control and formant shifting. Several banks of phonemes or segments of words are available.

8 synthesis models for noise and percussion

  • Granular sawtooth or sine oscillator, with variable grain density, duration and frequency randomization.

  • Clocked noise processed by a variable shape resonant filter.

  • 8 layers of dust/particle noise processed by resonators or all-pass filters.

  • Extended Karplus-Strong (aka Rings’ red mode), excited by bursts of white noise or dust noise.

  • Modal resonator (aka Rings’ green mode), excited by a mallet or dust noise.

  • Analog kick drum emulation (two flavors).

  • Analog snare drum emulation (two flavors).

  • Analog high-hat emulation (two flavors).

Dual output

  • The AUX output carries a variant, sidekick or by-product of the main signal. Patch both OUT and AUX to Warps for weird hybridization experiments!

  • Internal or external modulations

  • Dedicated CV input for synthesis model selection. No need to activate a mysterious META mode!

  • An internal decay envelope is normalled to the TIMBRE, FM and MORPH CV inputs: the amount of internal modulation is directly adjusted with the attenuverters.

  • Internal low-pass gate (LPG)

  • Dedicated LEVEL CV input controlling the amplitude and brightness of the output signal.

  • The internal LPG can also be directly plucked by the trigger input!

  • Two parameters of the LPG can be adjusted: amount of low-pass filtering; (VCFA to VCA), and response time of the virtual vactrol.


50mA @ +12v
5mA @ -12v
25mm Depth

Mutable Plaits Manual

All inputs: 100k impedance, DC to 2kHz.
FM, MORPH, TIMBRE input range: +/- 8V.
HARMO and MODEL input range: +/- 5V.
LEVEL and TRIG input range: 0 to +8V.
V/O input range: -3 to +7V.
16-bit CV capture.
Audio output: 48kHz, 16-bit, DC-coupled.
Internal processing: 32-bit floating point.

Plaits vs Braids?

Plaits shares no hardware or software with Braids!
Floating-point DSP code written from scratch or inherited from Elements, Warps and Rings.
Band-limited synthesis used almost everywhere, producing aliasing-free results at the base sample rate of 48kHz (Braids ran at 96kHz and used naive oversampling).
High-quality Sigma-Delta ADC for CV acquisition, approaching a resolution of 16-bit (12-bit for Braids).
ADC reads are interpolated in software to eliminate zipper noise.
DC-coupled audio output, extending the range of the module to very low frequencies (Braids could not reach LFO ranges).
Lean hardware design: less HP, mA and $!