happy-nerding-mmm

Happy Nerding MMM VCF

Dual Moog ladder filter with multimode outputs

6 HP Eurorack module

The MMM VCF is a dual voltage controlled filter based on Bob Moog's famous transistor ladder design, expanded with Band Pass and High Pass modes not available in the original. It can function as a stereo filter or be patched in different combinations, offering versatile spectral modification with vanishingly small noise and bleed.

Features

  • Dual VCF with common controls
  • Moog transistor ladder core
  • Three simultaneous filter outputs per channel
  • Self-oscillation capability
  • Reverse power protection
  • Low noise and bleed design

Controls & Jacks (28)

  • FREQ 2— Cutoff frequency for filter 2 (black side), 20 Hz - 22 kHz
  • FM 2— FM attenuator for filter 2 (black side)
  • FM 1— FM attenuator for filter 1 (silver side)
  • FREQ 1— Cutoff frequency for filter 1 (silver side), 20 Hz - 22 kHz
  • RES 1— Resonance for filter 1 (silver side), self-oscillation capable
  • BP 2 Mult— Band-pass output mult, filter 2
  • RES 2— Resonance for filter 2 (black side), self-oscillation capable
  • LP 1— Low-pass output, filter 1
  • HP 2— High-pass output, filter 2
  • BP 1 Mult— Band-pass output mult, filter 1
  • BP 1— Band-pass output, filter 1
  • Audio In 1— Audio input, filter 1
  • HP 1— High-pass output, filter 1
  • LP 2— Low-pass output, filter 2
  • FM CV 2— FM CV input, filter 2 (0-5V)
  • HP 1 Mult— High-pass output mult, filter 1
  • HP 2 Mult— High-pass output mult, filter 2
  • BP 2— Band-pass output, filter 2
  • FM CV 1— FM CV input, filter 1 (0-5V)
  • LP 1 Mult— Low-pass output mult, filter 1
  • Audio In 2 Mult— Audio input mult, filter 2
  • Audio In 2— Audio input, filter 2
  • Audio In 1 Mult— Audio input mult, filter 1
  • LP 2 Mult— Low-pass output mult, filter 2
  • RES 1 LED R— Resonance indicator, filter 1 (right)
  • RES 2 LED R— Resonance indicator, filter 2 (right)
  • RES 2 LED— Resonance indicator, filter 2
  • RES 1 LED— Resonance indicator, filter 1

How-To Guides

  • Stereo Filter Sweep
  • Self-Oscillating Drone
  • Multi-Output Spectral Split
  • Audio Rate FM Filtering
  • Cascaded Dual Filtering
  • Resonant Percussion Hits
  • Focused Lead Synthesis
  • Independent Stereo Modulation

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

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