epoch-modular-twin-peak

Epoch Modular Twin Peak

Dual resonant peaks, silky smooth and endlessly pingable

12 HP Eurorack module

The Epoch Modular Twin Peak MK2 is a dual bandpass filter with individually tunable resonant peaks, capable of smooth subtractive filtering, percussive pinging, and rich formant-like timbres. Its musical character is described as soft, smooth, and full — like a waterfall — with beautifully musical resonance that rewards both gentle filtering and aggressive self-oscillation. The MK2 revision adds increased output volume, improved resonance response, normalled CV routing, and attenuverters over the original's attenuators.

Features

  • Dual independently tunable resonant bandpass filter peaks (A and B)
  • CV A input normalled to CV B input for simultaneous control of both peaks from a single source
  • Attenuverters (bipolar) on CV A and CV B cutoff inputs
  • V/Oct input for pitch-tracking both filter peaks
  • Depth (A+B) input for simultaneously modulating both cutoffs
  • Resonance CV input for voltage-controlled resonance
  • Dual audio inputs with Mix Crossfader for blending between two sources
  • Excellent percussive pinging behaviour at high resonance
  • Improved output volume compared to MK1
  • Improved resonance response compared to MK1
  • MK2 circuit boards are green (MK1 had blue boards) for visual differentiation
  • Front panel identical between MK1 and MK2

Controls & Jacks (16)

  • LVL In/Fade— Controls input signal level and crossfades between Input 1 and Input 2 audio sources.
  • Curve— Morphs the filter response between lowpass (LP) and bandpass (BP) characteristics.
  • Dual Mod— Modulates both Peak A and Peak B frequencies simultaneously. Sweeps both filter peaks together for parallel modulation effects.
  • 1V/OCT— 1 volt per octave pitch tracking input for both Peak A and Peak B filters.
  • CV Res— CV modulation input for resonance/ping of both filters.
  • CV Mod B— CV modulation input for Peak B frequency. Depth and polarity set by Peak B Mod attenuverter.
  • Input 1— First audio input to the dual filter.
  • CV Mod A— CV modulation input for Peak A frequency. Depth and polarity set by Peak A Mod attenuverter.
  • CV D Mod— CV input for Dual Mod parameter. Voltage controls the depth of simultaneous modulation of both peak frequencies.
  • Peak A Mod— Attenuverter for CV modulation of Peak A frequency. Controls depth and polarity of CV Mod A input.
  • Input 2— Second audio input to the dual filter. Crossfaded with Input 1 via LVL In/Fade knob.
  • FLTR Out— Main filtered audio output combining both resonant peaks.
  • Res/Ping— Controls resonance of both filters simultaneously. At high settings, filters self-oscillate and can be pinged with triggers for tuned percus
  • Peak B Mod— Attenuverter for CV modulation of Peak B frequency. Controls depth and polarity of CV Mod B input.
  • Peak A— Sets the cutoff frequency of the first resonant peak filter.
  • Peak B— Sets the cutoff frequency of the second resonant peak filter.

How-To Guides

  • Classic Twin Peak Sweep
  • Vowel Formant Spread
  • Percussive Filter Pinging
  • Dual Source Crossfade Filter
  • Depth Modulation Both Peaks
  • Inverted CV Diverging Peaks
  • Melodic Sequenced Pinging
  • Complex Drone Unifier

Explore the interactive Twin Peak panel on BleepDex — tap any control to learn what it does.

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