The Electro-Harmonix FrEQuency Analyzer Ring Modulator infuses notes and chords with fluid, moving harmonies controllable through an easy interface of Shift and Fine control which set a specific frequency to add or subtract and a Blend knob which melds your signal with the newly created frequency. Separated from other ring mods, the FrEQuency's ability to control and contour high order filters for smoothing out cross distortions for an entirely new experience.