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Mutable Instruments Ripples

Inexpensive and space-constrained subtractive synthesis synth voice

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Mutable Instruments
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Our Price: $199.00

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Product Description
Additional Information
  • Product Description

    Ripples by Mutable Instruments delivers a classic, big-sounding analog four-pole filter in a small 8-HP package, continuing Mutable Instruments’ lineage of warm and tasty filters started by the Shruthi SMR4 mkII and 4-Pole Mission.

    3 filter modes are available: 2-pole band-pass, 2-pole low-pass, and 4-pole low-pass.

    Self-oscillation is available for all modes and produces a clean sine-wave on the LP4 output. Unlike many classic 4-pole designs, this filter does not suffer from “loudness drop” when resonance is increased. The resonance loudness compensation circuit brings a slight tone coloration reminiscent of the Roland SH/Jupiter filters, with a very round and “liquid” resonance.

    The 4-pole low-pass output is additionally sent to a VCA. This makes Ripples a good “final stage” module.


    • Signal in
    • Frequency CV 1 (1V/Oct)
    • Resonance CV. Self oscillation starts at 4V. Control voltages above 5V are non-linearly compressed, for fine control of resonance overdrive
    • Frequency CV 2 (with bipolar attenuator, from -1V/Oct to 1V/Oct)
    • VCA level. Control voltages above 5V are non-linearly compressed.


    • Cutoff frequency, 18Hz to 18kHz
    • Resonance (self oscillation at 80%)
    • Attenuverter on Frequency CV


    • 2-pole BP
    • 2-pole LP
    • 4-pole LP
    • 4-pole LP attenuated by VCA

    Technical characteristics

    • Fully analog, based on SSM2164 low noise/distortion quad VCA chip, and LM13700 OTA for that extra bit of non-linearity.
    • Frequency CV inputs impedance: 100k.
    • Audio input impedance: 75k.
    • Resonance and VCA CV input impedance: 30k.
    • Open-source hardware.
    • 8-HP.
    • Current consumption: +12V: 35mA ; -12V: 35mA.
  • Additional Information

    Condition New
    Module Slot Count 8hp
    Connector Type 3.5mm
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  • View FileMutable Instruments Ripples Manual (719.81 KB)