erica-synths-fusion-vcf-v3

Erica Synths Fusion VCF V3

Tube-driven 4-pole lowpass filter with mixer and self-oscillation

20 HP Eurorack module

The Erica Synths Fusion VCF is a 4-pole lowpass resonant filter combining vacuum tube drive between filter stages with germanium diode output limiting, producing a warm, organic sound with unique harmonic saturation character. It features selectable 24dB/oct and 12dB/oct slopes, resonance volume compensation, and a 3-input mixer with its own output that can be patched into self-oscillation for drone generation. The result is a deeply musical filter that functions as a standalone instrument.

Features

  • 4-pole lowpass resonant filter with vacuum tube drive between filter stages
  • Selectable 24dB/oct and 12dB/oct filter slopes via toggle switch
  • Resonance volume compensation circuit to maintain signal level at high resonance
  • Germanium diode based output signal limiter for organic, warm clipping
  • 3-input signal mixer with dedicated Mix Output jack
  • Mixer can be patched into self-oscillation by feeding Mix Out back into an input
  • Audio input level up to 20V peak-to-peak
  • CV input for cutoff frequency (-10V to +10V full span)
  • CV input for resonance
  • Configurable for +/-12V eurorack PSU or 6VAC Erica Fusion tube heater PSU
  • 14HP wide, 35mm deep
  • Designed and made in Latvia

Controls & Jacks (22)

  • IN3 LVL— Input level control for audio input 3
  • Gate Out— Gate output
  • Resonance— Filter resonance/emphasis with automatic volume compensation
  • OUT1— Audio output 1
  • Record CV— Attenuator for the Record CV input
  • IN1 LVL— Input level control for audio input 1
  • Mult In— Mult/aux input
  • IN2— Audio input 2
  • IN1— Audio input 1
  • OUT2
  • CV Out— CV output from recorded filter movement
  • IN3— Audio input 3
  • VCF IN— VCF audio input
  • OUT3
  • CV2 IN
  • CV1 IN
  • CV1 LVL— CV1 input level/attenuverter
  • IN2 LVL— Input level control for audio input 2
  • Record— Record button for capturing filter movement
  • Mix Out— Mixed output of all inputs
  • VCF Out— VCF filtered audio output
  • Cutoff— Filter cutoff frequency control

How-To Guides

  • Mixer Self-Oscillation Drone
  • Warm Tube Bassline Filter
  • Germanium Clipped Lead Sound
  • Three-Source Mix and Filter Sculpt
  • Live Resonance Sweep Performance
  • Envelope-Driven Filter Cutoff
  • Open Textural Filter on 12dB
  • Pre-Filter Tube Saturation

Explore the interactive Fusion VCF V3 panel on BleepDex — tap any control to learn what it does.

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