Moog Moogerfooger MF-105 MuRF

The Moog Moogerfooger MF-105 MuRF (Multiple Resonance Filter Array), introduced in 2004, is a groundbreaking effects processor that combines elements of a graphic EQ, band-pass filter bank, and sequencer. Designed by Bob Moog, the MuRF features eight resonant filters with adjustable gain sliders and a built-in animation engine that sequences the filters in rhythmic patterns. This allows for dynamic, evolving textures and spectral movement across the audio signal. The MuRF was released in different versions, including the MF-105B Bass MuRF, optimized for lower frequencies, and the MF-105M MIDI MuRF, which added MIDI control for enhanced programmability. Known for its versatility and experimental potential, the MuRF became a favorite among musicians seeking unique filtering and rhythmic effects.

Historical Development

• Release (2004): The MF-105 MuRF was part of Moog's Moogerfooger series, designed to bring modular synth-style functionality to pedal form. It offered 24 preset animation patterns and extensive control via CV inputs.
• Variants: The Bass MuRF (MF-105B) featured lower filter frequencies tailored for bass instruments. The MIDI MuRF (MF-105M) combined both standard and bass filter ranges with MIDI capabilities for expanded control.
• Legacy: Discontinued in 2018 alongside the rest of the Moogerfooger line, the MuRF remains highly sought after for its unique sound-shaping abilities.

Notable Players

• Adrian Belew: Used the MuRF to create rhythmic, animated textures in his experimental guitar work.
• Radiohead: Known to incorporate Moogerfoogers like the MuRF into their studio setups for evolving soundscapes.
• Electronic Producers: Widely used in electronic music for creating animated filter sweeps and rhythmic modulation.

Popular Settings

The MuRF's flexibility allows for a range of creative applications:

• Rhythmic Filtering: Use preset patterns with high resonance settings to create pulsing, animated textures.
• Bass Enhancement: Engage the Bass MuRF's low-frequency filters with subtle animation for thick, dynamic bass tones.
• Stereo Movement: Use stereo outputs to spread odd and even filters across channels, creating immersive spatial effects.

Legacy

The Moog MF-105 MuRF is celebrated as one of the most innovative pedals in the Moogerfooger line. Its ability to combine filtering, sequencing, and modulation opened up new creative possibilities for guitarists, bassists, and producers alike. While no longer in production, its influence persists through modern software recreations like the MF-105S plugin. The MuRF's unique approach to spectral animation ensures its place as a timeless tool for experimental sound design.