Mutable Instruments Ripples Eurorack Filter Module
Ripples from Mutable Instruments delivers a classic, big-sounding analogue four-pole filter in a small 8-HP Eurorack module.
- Fully analogue filter
- Three different filter modes
- Self-oscillation available in all modes
- 4-pole LP output available through VCA
- 8 HP Eurorack module
Ripples continues Mutable Instruments' lineage of warm and tasty filters started by the Shruthi SMR4 mkII and 4-Pole Mission.
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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 for an inexpensive/space-constrained subtractive synthesis synth voice.
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
4-pole LP attenuated by VCA
Fully analogue, 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.
Current consumption: +12V: 35mA, -12V: 35mA.
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1 Recommended Accessory
Brand Mutable Instruments Condition New On demo in store No Documentation http://mutable-instruments.net/modules/ripples/manual
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