From EHX:Adds moving harmonies to the note or chords being played. Unlike other Ring Modulators, the Frequency Analyzer has controllable high order filters that reduce cross distortions and enhance the variations. The course and fine control let the user set a single frequency that will then be both added and subtracted from the original note or chord. Blend control lets you mix the new notes with the original. This is a must have pedal, especially for techno cats. Devo had their biggest hit using the Frequency Analyzer. Free Shipping Big Muff Knob Layout - familiar Sustain, Tone and Volume controls MIDS EQ - fully parametric MIDS EQ includes variable frequency sweep, boost or cut level control and switchable Q or bandwidth amount Footswitch for MIDS EQ -turn on the MIDS EQ circuit with the stomp of your foot Gate - remove unwanted hum Attack -preserves pick attack with an enhanced version of your dry signal Bass Boost - switchable bass boost Expression Pedal Input - sweep the frequency of the MIDS EQ with your foot True Bypass Parkway Music is an Authorized Dealer. Our shipments are always insured and packaged securely and professionally. All of our gear is fully inspected to meet our high-quality standards and checked over by in-house techs prior to shipping. Please feel free to reach out to us for more information!