MF-105S MuRF

Name: MF-105S MuRF
Price: 79 USD
Author: Moog

by Moog · Filter · Resonant filter bank with pattern sequencer

Not rated yet

MF-105S MuRF is Moog's software version of the Multiple Resonance Filter Array, an 8-band resonant filter bank driven by patterns.

Built-in and custom patterns animate the bands in time, and it costs $79.

Best for: Keys & Synths, Guitars, Sound Design, Drums. Genres: Electronic & EDM, Ambient & Cinematic, Rock & Indie.

Keywords: rhythmic, electric guitar, bass, wide, drums, experimental, mixing, sound design, pads.

What it does

MF-105S is Moog's software re-creation of the MF-105 MuRF (Multiple Resonance Filter) pedal from 2004. It combines "a resonant filter bank with a pattern generator and skewing envelope" to animate incoming audio, and Moog says it also captures how the original's controls interact.

8 resonant bands: an array of eight resonant filters, switchable between a bass and a mid voicing.
Animation: a pattern generator plays sequences of envelopes that move the levels of the eight filters; Sound On Sound counts a 64-step sequencer with 11 preset patterns per voicing.
Pattern editor: edit the existing patterns or build your own.
Envelope mode: switch between the original envelope shapes and a new alternate bank, from short blips to backwards-sounding swells.
Stereo mode: send all eight filters to both channels, or split them left and right for a stereo spread.
CV inputs: virtual CV for pattern rate, internal LFO rate, envelope shape, LFO amount and mix, with attenuation to soften the modulation.

Source: Moog product page

When to use it

MuRF is the pick for a specific sound: eight resonant bands stepping in patterns, which gives a rhythmic, shimmering animation that a single sweeping filter can't. Compared with FilterShaper XL and WOW2, it has much less modulation routing and no MIDI control, but it has a distinct analog-pedal character. Unlike FilterFreak or Volcano 3, it is not a general-purpose filter you can sweep and automate precisely. It works best as a colour effect on guitar or as a texture layer, rather than as a utility filter.

Best for: rhythmic, animated filter textures on electric guitar, and on chords or pads mixed with plenty of dry signal.
Genres: electronic, ambient, indie and experimental rock.
Look elsewhere if: you want a single sweepable filter (MF-101S, Volcano 3) or tight MIDI-synced modulation (FilterShaper XL, WOW2).
Tip: let plenty of dry signal through; otherwise everything takes on a bass- or mid-heavy tone (Sound On Sound).

What producers say

Sound On Sound liked it as the most experimental of the Moogerfooger plugins, with a few practical limits.

Sound On Sound (Robin Bigwood, 2023) praised its "rhythmic potential" and the stereo spread of the filters, and found it worked best on electric guitar rather than drum loops or synth pads.
Criticisms: a bass- or mid-dominated tone unless you mix in dry signal, an onboard LFO rate that can't be controlled directly, and no MIDI control across the Moogerfooger range.

Sound On Sound review

Where to buy

Tutorials and reviews

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