Erica Synths Pico VCF

Polivoks-inspired gritty filter in 3HP

3 HP Eurorack module

The Pico VCF1 is a compact 3HP voltage-controlled filter inspired by the legendary Polivoks synthesizer, offering lowpass and bandpass modes with a distinctly aggressive, Soviet-era character. Its rare Russian operational amplifiers give it a raw, gritty sonic personality that stands apart from more clinical filter designs. At maximum resonance, the filter self-oscillates, turning it into a sine wave oscillator source.

Features

• Polivoks-inspired filter character using rare Russian operational amplifiers
• Lowpass and bandpass filter modes via toggle switch
• Self-oscillation at maximum resonance
• CV input with dedicated attenuator knob for cutoff modulation
• 3HP compact Eurorack format

Controls & Jacks (7)

• IN— Audio input
• Resonance— Controls the amount of resonance/feedback. At maximum, the filter self-oscillates.
• CV IN Attenuator— Attenuator for the CV input signal, controlling how much the CV affects the cutoff frequency
• Cutoff— Controls the filter cutoff frequency
• OUT— Filtered audio output
• CV IN— Control voltage input for modulating cutoff frequency
• LP/BP Mode— Selects between lowpass and bandpass filter modes

How-To Guides

• Aggressive Bass Sweep
• Self-Oscillating Sine Source
• Telephone / Radio Effect
• Envelope Filter Sweep
• LFO Auto-Wah
• Random Filter Chaos
• Resonant Filter Ping
• LP vs BP Character Comparison

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