Erica Synths — Black Multi Mode VCF

Manual PDF

Erica Synths Black Multimode VCF Manual (PDF)

Erica Synths Black Multimode VCF — Cheat Sheet

Type: Multimode Analog VCF
Modes: Simultaneous HP, BP, LP outs
Core: AS3320 (custom multimode chip, made in Riga!)
Special feature: Adjustable germanium diode overdrive on input

Controls & Jacks Overview

Inputs

Label	Type	Description	Range
IN	Audio	Audio input (apply overdrive via knob)	-
CUTOFF CV	CV	Modulates cutoff frequency	±5V (10Vpp)
RESO CV	CV	Modulates resonance	±5V (10Vpp)

Outputs

Label	Type	Description	Range
LP OUT	Audio	Lowpass output	10Vpp
BP OUT	Audio	Bandpass output	10Vpp
HP OUT	Audio	Highpass output	10Vpp

Knobs and Controls

CUTOFF: Manual cutoff frequency
RESONANCE: Manual resonance (will self-oscillate at max)
IN/DRIVE LVL: Audio input/drive control
Up to 12:00 = increasing input level
Past 12:00 = adds germanium diode overdrive
C-OFF CV: Attenuverter for cutoff CV input (bi-polar modulation)
RESO CV: Attenuator for resonance CV input

Quick Operation Guide

Patch Audio Source:
Patch your waveform/signal into IN (Audio Input).
Output Selection:
Use LP OUT, BP OUT, and/or HP OUT simultaneously.
Set Input Gain & Overdrive:
Adjust IN/DRIVE LVL.
Below 12 o'clock = clean gain
Above 12 o'clock = overdrive coloration (unique germanium diode circuit)
Shape With Filter:
CUTOFF for frequency sweep
RESONANCE for resonance/squelch. Fully clockwise will self-oscillate.
Add Modulation:
Patch CV into CUTOFF CV for filter sweeps (±5V for full sweep, attenuate/bipolar with C-OFF CV).
Patch CV into RESO CV to modulate resonance amount (attenuate with RESO CV knob).
Experiment:
Use the outputs in parallel for creative patching (e.g., parallel HP/LP, band splitting, etc).

Voltage Ranges

CV Inputs: ±5V (10V peak-to-peak) for full sweep
Audio Outputs: 10V peak-to-peak

Important Specs

Width: 10HP
Depth: 35mm
Power: +12V: 27mA, -12V: 29mA
Skiff-friendly construction

Pro Tips - Use the overdrive for aggressive textures. - Use external or internal modulation (LFO, envelope, sequencer) for dynamic filter sweeps. - The self-oscillation mode can be used as a sine wave oscillator.

For warranty, maintenance, and more, see Erica Synths official site.

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