The Erica Synths Pico VCF1 is a voltage controlled filter and the younger brother of the Polivoks VCF by Erica Synths. Pico VCF1 is based on a similar topology with rare Russian OpAmps (operational amplifiers). The analog filter extends the domestic modular system by a low-pass and bandpass mode. Pico VCF1 creates great acid basslines, resonance sweeps and deep wobble sounds. The Pico series is a series of highly functional 3HP modules in Eurorack format.