Features

The award-winning MF-101 is an effect designed by Bob Moog. It features the legendary Moog filter and an envelope follower for direct control of the filter sweep. Use the MF-101 with your bass, guitar, keys, sampled or recorded tracks to create the classic Moog filter effect - without any digital influences.

The MF 101 Low Pass Filter is a direct descendant of the Moog Modular Synthesizer. It combines two complete modular functions: a voltage controlled low pass filter and an envelope filter. It can handle any instrument level or line level signal.

The Moogerfooger's filter control parameters are signal mix amount, cutoff frequency, resonance amount and envelope amount. All low pass filter parameters can be controlled by knobs that feel great to tweak, expression pedal or external CV. Panel switches select filter mode and envelope follower speed. Standard jacks are provided for audio in/out, pedal input and envelope follower output. A sturdy yet smooth acting bypass switch can be used on either a table top or with your foot.

A low pass filter reduces the high frequency content of a sound, making the tone mellower or more muted. A lower cutoff setting results in a more muted tone. Think of window blinds: as you turn them down, they block out the light at the very top, then the light in the middle, and eventually all the light is blocked. The MF-101 low pass filter does the same kind of thing in the audio domain.

As you turn up the Resonance control, harmonics closer to the cutoff frequency are boosted. Resonance gives the Moogerfooger filter the classic Moog filter sound found on the Minimoog and Moog modular synthesizers.

The envelope follower follows the loudness waveform and emits a voltage that follows the dynamics of your playing. Every time you play, the envelope voltage goes up and down. The harder you play, the higher the envelope voltage is emitted. The envelope follower opens and closes the low pass filter. It's helpful to think of the envelope voltage as an invisible hand that turns the cutoff knob up and down as you play notes. Because the envelope follows the dynamics of your instrument signal, you are manipulating the filter just as you play your instrument.