This is a quality analog modeling resonant filter. Vst lagin uses high-quality unique algorithms in its work, optimized for use directly in real time, and includes several models of various filters, including those based on the Korg MS20 mk2 – “Sallen Key MS2” and “Sallen Key” and based on SH-9 and Roland Juno-6 – “Cascade” and “Cascade SH”