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The MF-105 MuRF is a very unique effect designed by Bob Moog. MuRF is short
for Multiple Resonance Filter Array. The MuRF provides sequenced filter effects
that have not been heard before! How many times have you wondered, "Why aren't
there any NEW effects?" Whether you play guitar, bass, keyboard, make beats, or
work in the studio - most effects boxes are based on the same old classics. The
Moogerfooger MF-105 MuRF is the antidote to generic, boring effects. For all
players, the MuRF will open up new sonic worlds for you!
MuRF stands for "Multiple Resonance Filter Array". What this means is the
MuRF has 8 filters - their levels are controlled by 8 sliders. It looks like a
graphic eq, but the sound of the filters are very different: warm and resonant.
What is really unique is the ability to animate the levels of the 8 filters
in up to 24 preset patterns. The rate of the patterns can be set by a knob,
expression pedal, or plug a footswitch into the tap tempo input to match the
rate to the tempo of your song. Rhythmic variations can be created by adjusting
the levels of the filters. The Envelope control sets the shape of the
modulation, which can be set for percolating techno rhythmic modulation or
shimmering timbral morphing. Other controls include Input Drive, Output Level
and Wet/Dry Mix.
MuRF shares the musician-oriented features that are common to all
Moogerfoogers. All the audio processing is 100% genuine analog, for warm, fat
sound quality. Any line level or instrument level audio signal may be processed.
Wide-ranging player parameters may be controlled from the panel knobs as well as
from expression pedals or CV-compatible analog synthesis instruments. Components
are rugged and long lasting, to withstand the rigors of stage and studio. The
MuRF is housed in the classic Moogerfooger "double-wedge" enclosure that may be
used on a table or on the floor.
Front Panel Features
• DRIVE Rotary Control: Adjusts the gain of the audio input circuit.
• OUTPUT Rotary Control: Adjusts the output level when the effect is
active. Used for balancing the filtered signal with the bypassed signal.
• MIX Rotary Control: Sets the proportion of direct to effected signal that
appears at the output.
Animation
• PATTERN Rotary Switch: Selects one of 12 Animation Patterns in each bank.
• BANK Slide Switch: Selects which bank of Patterns is active.
• RATE Rotary Control: Sets the Rate of the Pattern.
• ENVELOPE Rotary Control: Sets the envelope shape of the patterns.
• FILTERS Slider Controls: Controls the gains of the following frequency
bands: 200 Hz, 300 Hz, 450 Hz, 675 Hz, 1KHz, 1.5 KHz, 2.2 KHz, 3.4KHz.
• DRIVE LED: 3-color LED indicates the level of the Input signal. Green
indicates a low-level signal, yellow indicates optimal signal level, and red
indicates soft clipping.
• BYPASS LED: 2-color LED indicates effect status. Red indicates bypass,
and Green indicates the effect is active.
• RATE LED: Indicates the Rate of the Animation Pattern.
Jack Panel Features
• AUDIO IN: Phone jack accepts any instrument-level or line-level signal
from 16 dBm to +4 dBm. Input impedance is 1 megohm.
• LEFT/MONO OUT: Phone Jack carries the summed signal (left+right, all
freq. bands) when Right Output is not connected, and carries the Left output
signal (Freq. bands: 200 Hz, 450 Hz, 1 KHz, 2.2 KHz) when the right output is
connected. Nominal output is 16 dBm to +4 dBm depending on setting of Output
Level control when effect is active. Output impedance is 5,000 Ohms.
• RIGHT OUT: Phone Jack carries the Right Output signal (Freq. Bands 300
Hz, 675 Hz, 1.5 KHz, 3.4 KHz). Nominal output is 16 dBm to +4 dBM depending on
setting of Output Level control when effect is active. Output impedance is 5,000
Ohms.
RATE, MIX, ENVELOPE, LFO/SWEEP are TRS jacks that accept moogerfooger EP-1
(or equivalent) expression pedals, or control voltages from two or
three-circuit jacks.
TAP/STEP IN: This tap tempo input accepts a normally open momentary
footswitch for syncing the rate of ANIMATION to the tempo of the music.