The Moogerfooger MF-105M MIDI MuRF from Moog is a multiple resonance filter array that employs an 8-analog filter array whose volume levels can be animated by 24 preset patterns.

The rate of the patterns can be dictated by the front-panel knob, optional expression pedal, or optional tap-tempo pedal. The MIDI MuRF accepts instrument- and line-level sources and has control voltage, expression pedal, and MIDI inputs for external control over any parameter.

Thanks to its MIDI implementation, the MuRF can be tempo-synced to a MIDI clock as well as respond to MIDI program change messages. It is designed to be used as a tabletop or pedalboard effect.

Controls Pattern Rotary Switch: Selects one of 12 Animation Patterns in each bank
FREQ Slide Switch: Selects whether Bass or Mids pattern bank is active
LFO Slide Switch: Applies LFO modulation to patterns
Rate Rotary Control: Sets the Rate of the Pattern. Sets Clock Divider value when synced to MIDI Time Clock
Envelope Rotary Control: Sets the envelope shape of the patterns
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
Filters Slider Controls: Controls the gains of the following frequency bands (determined by FREQ Slide Switch): Bass -110 Hz, 160 Hz, 240 Hz, 350 Hz, 525 Hz, 775 Hz, 1.2 kHz, 1.8kHz. MIDS - 200 Hz, 300 Hz, 450 Hz, 675 Hz, 1 kHz, 1.5 kHz, 2.2 kHz, 3.4 kHz
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: 3-color LED indicates effect status. Red indicates bypass, and green indicates Mid Voicing, orange indicates Bass Voicing
Rate LED: Red = Pattern Clock Rate determined by the Rate control/CV Input, Green = Pattern Clock Rate determined by Tap Tempo/Step control and Orange = The Current State has been last modified by MIDI and the front-panel control knob doesn't indicate the state of the unit
I/O Audio In: Phone jack accepts any instrument-level or line-level signal from 16 dBm to +4 dBm. Input impedance is 1 mΩ
Left/Mono Out: Phone Jack carries the summed signal (left + right, all frequency bands) when Right Output is not connected, and carries the left output signal (frequency bands: 200, 450 Hz, 1, 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 Ω
Right Out: Phone Jack carries the right output signal (frequency bands 300, 675 Hz, 1.5, 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 Ω
Rate, Mix, Envelope, LFO/Sweep: 1/4" (6.3 mm) TRS jacks that accept Moogerfooger EP-2 (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
MIDI System Real-time: MIDI Timing Clock, MIDI Start, Continue and Stop
Channel Voice Messages: Program Change, Control Change, Note On/Note Off
System Exclusive Messages: change MIDI channel, write user pattern sets, firmware upgrade.
Program Change: A MIDI Program change received on the current MIDI Channel with a value 000-023 will override the position of the pattern and frequency switch. A movement of the Pattern Knob or the frequency switch sets the MIDI MuRF's current pattern to the one selected by the front panel
Control Change Messages: The MIDI MuRF can respond to MIDI CC messages to alter the settings of the MuRF or the pattern clock rate. Changes made by MIDI CCs are over-ridden by moving the corresponding panel control or changing the state at the corresponding CV input
Note On Messages: In Mute Mode, Triggered Mode and Sustained Mode, MIDI Note On messages can play the MIDI MuRF's filters. In Step Mode the rate setting is ignored and Note On messages advance the pattern step
System Realtime:
MIDI_RTC_Clock: MIDI Clock sets the rate of the pattern clock. When synced to MIDI Clock, the Rate LED flashes orange at the Clock division
MIDI_Start: MIDI Clock Start Messages starts the Pattern Clock at the beginning of the Pattern, and synced to the MIDI Clock messages
MIDI_Stop: MIDI Clock Stop Message stops the Pattern Clock
MIDI_Continue: MIDI Clock Continue Message restarts a stopped Pattern Clock at the next step in the Pattern.
Clock_Divisions: Front-panel RATE knob/CC9 or LFO Rate CV Input/CC3 are quantized to 16 positions and sweep through clock-divisions of MIDI Clock Messages (12 o'clock is quarter-note)

MIDI Channel: Defaults to Channel 1 on each power up, unless the stomp switch is closed. If the stomp switch is closed when power is applied then the Pattern Rotary switch sets the current MIDI Channel from 1-12. Changes are stored on power down
Power Requirements 105 to 125 V AC
5 W 220 AC 50 Hz
Dimensions (L x H x W) 9 x 6 x 3" (228 x 152 x 76 mm)
Weight 4 lb (2 kg)

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