mannequins-three-sisters

Mannequins Three Sisters

Resonant triple filter bank with oscillation

10 HP Eurorack module

Three Sisters is a resonant multimode filter bank with three individually tunable filters that can operate as a formant filter or triple bandpass. It features self-oscillation capabilities and can function as a triple oscillator, with extensive CV control over frequency spacing and individual filter parameters.

Features

  • Three resonant filters
  • Individual filter outputs
  • Mixed ALL output
  • CV control over frequency and span
  • Self-oscillation capability
  • V/Oct tracking

Controls & Jacks (17)

  • Span— Adjusts the relationship between the three oscillator/filter voices
  • Centre— Sets the center frequency of the Centre band filter. Also acts as the master frequency control that shifts all three filter bands together.
  • FM Attenuator— Attenuator for the Freq CV input. Controls how much external CV affects the filter frequency.
  • Low Out 2— Low frequency/filter output
  • Quality— Controls the resonance/Q of all three filter bands. Higher settings produce sharper peaks and eventually self-oscillation.
  • Centre In— Audio input routed exclusively to the Centre band filter.
  • Centre Out 2— Secondary Centre band output with inverted phase. Useful for creating notch responses when mixed with other outputs.
  • Low Out 1— Low frequency/filter output
  • Span CV— Adjusts the relationship between the three oscillator/filter voices
  • Freq CV— Controls the primary frequency/pitch of the oscillators
  • Centre Out— Centre band filter output
  • High Out 1— High frequency/filter output
  • Crossover— Audio input that crossfades between the Low and High filter bands, bypassing Centre.
  • High Out 2— High frequency/filter output
  • All Out— Mixed output of all three voices
  • Quality CV— CV input for external modulation of the Quality (resonance) parameter. Bi-polar.
  • Formant— Toggles between Formant and Oscillator modes. In Formant mode, Span adjusts spacing between bands. In Oscillator mode, each band self-oscill

How-To Guides

  • Formant Vowel Shaping
  • Self-Resonant Triple Oscillator
  • Sweeping Bandpass Filter
  • Resonant Percussion Pings
  • Evolving Harmonic Drone
  • Talking Bass Synth

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

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