Swirls consists of three effects; a Tri-Stereo Chorus emulation, a micro pitch-shifter effect and an aggressive, VCA-style compressor.This particular stack of effects has become rather famous, and probably best known from Michael Landau's seminal album, Tales from the Bulge. In the 80s, big racks were all the rage, and guitarists would frequently stack effects in parallel to add more "thickness" to their sound. But this usually required multiple rack units and complex wiring systems to accomplish, with the end result being the size of an average fridge.