Evolved from the oscillator mixing section of Mutable Instruments’ desktop hybrid synths, Warps is designed to blend and combine two audio signals. A variety of cross-modulation methods – some of them emulating classic analog circuits, some of them purely digital – are provided by the module. With Warps, the cross-modulated sound can be sculpted with control voltages along 4 dimensions: by controlling the amplitude and distorting the input signals, by smoothly scanning through the collection of modulation algorithms, and by adjusting a timbre parameter controlling the brightness/harshness of the modulated signal.

Most cross-modulation algorithms provided in Warps make the distinction between a carrier signal and a modulator signal: the carrier signal will be filtered or modulated to acquire some of the characteristics of the modulator signal. However, some other algorithms emulate symmetrical circuits and do not make such a distinction (the underlying mathematical operation is commutative).

Since many classic cross-modulation effects work best when the carrier is a simple waveform – for example, a sine wave for ring-modulation or a buzzing waveform simulating glottal pulses for vocoding – Warps includes a digital oscillator offering a handful of classic waveforms. This internal oscillator tracks V/Oct and will replace the carrier audio input – freeing up one oscillator in your system for other duties!

Modulation Algorithms

Crossfade: The carrier and modulator are crossfaded into each other, using a constant-power law. TIMBRE controls the crossfading position – both signals are equally mixed at 12 o’clock.

Crossfolding: The carrier and modulator are summed, a tiny bit of cross-modulation product is added to spice things up, and the resulting signal is sent to a wavefolder the amount of which is controlled by TIMBRE.

Diode ring-modulation: The carrier and modulator are crudely multiplied, using a digital model of a diode ring-modulator. TIMBRE post-processes the resulting signal with a variable amount of gain (and emulated diode clipping).

Digital ring-modulation: A gentler version of the previous algorithm which uses a proper multiplication operation in the digital domain, which will sound more similar to all the AD633-based analog ring-modulators out there! TIMBRE post-processes the signal with a gain boost and soft-clipping.

XOR modulation: Both carrier and modulator are converted to 16-bit integers, and the two resulting numbers are XOR’ed bit by bit. TIMBRE controls which bits are XOR’ed together.

Comparison and rectification: A handful of signals are synthesized through comparison operations (“replace the negative portion of the carrier’s signal by the modulator”, “if the absolute value of the carrier is greater than the absolute value of the modulator, output the modulator else the carrier”…). TIMBRE morphs through these signals (some of which having an octave pedal flavor).

Vocoder: A classic implementation of an analog vocoder, with a bank of 20 analysis and 20 synthesis third-octave 48dB filters. The modulator sub-band signals are processed by envelope followers from which are derived the gains of each of the carrier sub-band signals. TIMBRE warps the connections between the modulator’s envelope followers and the carrier’s gain elements – effectively shifting up or down the formants extracted from the modulator signal.

As the ALGORITHM knob is turned clockwise, the release time of the envelope followers is increased.

By turning the knob fully clockwise, the modulator signal is frozen. The carrier is filtered by whichever formants were present in the modulator signal before the knob reached this position.


  • Modulation Algorithm: selects which signal processing operation is performed on the carrier and modulator
  • Modulation Timbre: controls the intensity of the high harmonics created by cross-modulation
  • Internal Oscillator State: enables the int. oscillator and selects its waveform. The color of the LED depends on the oscillator waveform When the IOS LED is off, the int. oscillator is disabled and an ext. signal is used as a carrier
  • When an ext. carrier is used, this knob controls the amplitude of the carrier.
  • When the int. oscillator is active, this knob controls its frequency
  • The modulator amplitude knob controls the amplitude of the modulator. Note that gains above 1.0 can be applied, for a warm overdrive effect
  • When the int. oscillator is switched off, this CV input controls the gain of the carrier input
  • When the int. oscillator is enabled, it acts instead as a V/Oct control for the oscillator frequency
  • Modulator amplitude CV input controls the gain of the modulator input. When a signal is patched into this input, the amount of CV modulation is controlled by the Modulator amplitude knob
  • Algorithm CV input is added to the position of the Modulation algorithm knob
  • Timbre CV input is added to the position of the Modulation timbre knob

Product Specs

Brand New (New)
Mutable Instruments
Warps Algorithmic Modulator

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Mutable Instruments Warps Algorithmic Modulator
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