At first glance, the VCF1 seems to be a typical analog filter. There are audio input and output connectors, potentiometers for cutoff and resonance as well as a control voltage input plus attenuator. The latter influences the filter frequency. A switch lets the user choose between low-pass and band-pass characteristic.
What sets the Pico VCF1 aside from other analog filters is its sound. Thanks to rare K140UD12 op-amps, the circuit creates extremely powerful results with beefy, wet sounding resonance. – Just like the role model from Russia. In low-pass mode, high resonance values don’t affect the low end of sounds. Therefore, it is not a problem to add acid-type chirping to deep basses. With the resonance knob turned fully clockwise, the circuit starts to self-oscillate. By adding a LFO this can lead to nice, bubbly effects.
audio input and output
voltage control socket for the cutoff
3U Eurorack module, 3 HP wide, 35 mm deep
Power consumption: 12 mA at +12 V und 11 mA at -12 V.