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The Moogerfooger Lowpass Filter features a 2‑pole/4-pole variable resonance filter with envelope follower and is available in AAX, TDM, RTAS, and AudioSuite formats. Use it to achieve classic 60s and 70s sounds on bass and electric guitar, or just dial in some warm, fat analog resonance when you need it.
With the invention of the MOOG® synthesizer in the 1960s, Bob Moog started the electronic music revolution. A direct descendent of the original MOOG Modular synthesizers, the Moogerfooger Lowpass Filter provides two classic MOOG modules: a Lowpass Filter and an Envelope Follower.
A low pass Filter allows all frequencies up to a certain frequency to pass, and cuts frequencies above the cutoff frequency. It removes the high frequencies from a tone, making it sound more mellow or muted. The Moogerfooger Lowpass Filter contains a genuine four-pole lowpass filter. We say “genuine” because the four-pole filter—a major part of the “MOOG Sound” of the 60s and 70s—was first patented by Bob Moog in 1968! The digital version preserves all the character, nuances, and personality of his original classic analog design.
An Envelope Follower tracks the loudness contour, or envelope, of a sound. Think of it like this: each time you play a note, the envelope goes up and then down. The louder and harder you play, the higher the envelope goes. In the Moogerfooger Lowpass Filter, the Envelope Follower drives the cutoff frequency of the Lowpass Filter. Since the envelope follows the dynamics of the input, it “plays” the filter by sweeping it up and down in response to the loudness of the input signal.