Modular synthesizer enthusiasts looking for a bold voltage-controlled filter in a small form factor will be impressed with the erica synths Pico VCF1, a Eurorack compatible filter module that utilizes a similar topology to the Black Polivoks filter and is made using rare Russian opamps. As a result, you get a filter that's great for acid basslines, screaming resonance sweeps, and deep wobbles. The Pico VCF1 includes a ribbon power cable and mounting screws.