Cwejman FSH-1

The Cwejman FSH-1 is a dual-channel, voltage-controlled filter module designed for use in Eurorack modular synthesizers. It was designed by Swedish synthesizer designer Cwejman and released in 2011. The FSH-1 is a multi-mode filter with two independent filter channels, each with its own frequency, resonance, and gain controls. It also features a unique “Frequency Modulation” control, which allows the user to modulate the frequency of one filter channel with the other. The FSH-1 has been used by a variety of artists, including Aphex Twin, Autechre, and Squarepusher.