Moog Moogerfooger Low Pass Filter
Wah & Filter Effects Pedals
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A direct descendant of the original Moog synths!
Classic Analog Sound
What is a Lowpass Filter?
A lowpass filter removes high frequencies from a tone. It makes the tone sound more mellow or muted. The lower the cutoff, the more muted the tone sounds. Imagine a window shade. As it is pulled down, it cuts out the higher light, then the light from the middle of the window, then finally all the light. A lowpass filter does the same sort of thing to the sound spectrum
The moogerfooger filter is a direct descendant of the original Moog modular synthesizers. It contains two complete modular functions: a voltage-controlled lowpass filter and an envelope follower.
The envelope follower tracks the loudness contour (envelope) of a sound, and produces a voltage that follows the dynamics of your playing. Every time you play a note, the envelope voltage goes up and then down. The harder you play, the higher the envelope voltage goes. The envelope follower opens and closes the lowpass filter. Think of the envelope voltage as an invisible hand that turns the CUTOFF knob up and down every time you play a note. Since the envelope follows the dynamics of your instrument's signal, you actually "play" the filter as you play your instrument.
The moogerfooger filter is also a resonant filter. As you turn up the resonance, the overtones near the cutoff frequency are boosted. Resonance gives the moogerfooger filter the same classic Moog filter sound as the Minimoog(TM) and Moog modular synthesizers.
The moogerfooger filter's control parameters are signal mix, cutoff frequency, resonance amount, and envelope amount. All of the Lowpass Filter's parameters can be controlled with expression pedals or external control voltages as well as by rotary panel controls. Panel switches select filter mode and envelope follower speed. 1/4" jacks are provided for audio input and output, pedal/control inputs and envelope follower output.
- Cutoff rotary control
- Resonance rotary control
- Envelope Amount rotary control
- Mix rotary control
- Drive rotary control
- Smooth-fast rocker switch
- 2-pole/4-pole rocker switch
- 3-color LED to set Drive control
- On/Bypass switch
- 1/4" audio out jack
- 1/4" audio in jack accepts any instrument- or line-level signal
- Cutoff, Resonance, Amount, and Mix 1/4" jacks that accept moogerfooger EP-1 or equivalent expression pedals
- Envelope out jack delivers the envelope control voltage for use by other voltage-controlled devices
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Moogerfooger Low Pass Filter Specifications:
- +9V POWER INPUT: Jack that accepts standard 9 volt power adaptors (power adaptor included).
2-POLE 4-POLE: Rocker switch, which chooses between 2-pole (bright) and 4-pole (deep) filter frequency response.
AUDIO IN: 1/4" phone jack - accepts any instrument-level or line-level audio signal from -16 dBm to +4 dbm.
AUDIO OUT: 1/4" phone jack - -4 dBm nominal output level.
BYPASS: Two-color LED that tells whether the filter is on or bypassed.
CUTOFF: Rotary control, which varies the filter's cutoff frequency over an eight-octave range.
CUTOFF, RESONANCE, AMOUNT, MIX: All of which are stereo 1/4" jacks that accept moogerfooger EP1 (or equivalent) expression pedals, or control voltages from either two-circuit or three-circuit 1/4" jacks.
DRIVE: Rotary control, which adjusts the gain of the audio input.
ENV: LED that indicates the strength of the envelope voltage.
ENVELOPE AMOUNT: Rotary control, which adjusts the amount that the input signal's envelope sweeps the filter cutoff frequency.
ENVELOPE OUT: Delivers the Envelope Control voltage for use by other voltage-controlled devices.
LEVEL: Three-color LED that is used to set the DRIVE control.
MIX: Rotary control, which crossfades continuously from unfiltered to filtered audio.
ON/BYPASS: Rugged, smooth-acting 'stomp switch.'
RESONANCE: Rotary control, which varies the shape of the filter's response, from pure lowpass to actual oscillation.
SMOOTH-FAST: Rocker switch, which chooses between smooth and fast envelope follower response.
Type: Envelope Filter
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Comments about Moogerfooger Low Pass Filter:
I use this pedal with a Fender Rhodes mostly. It gives it more gain (drive) and adds some grit. The Cutoff knob is what it's all about, but the resonance filter can give you some new sounds that you can incorporate if you experiment. Works great with bass guiatr. if you want full effect on a guitar instrument, get the pedal accessory that will work the cutoff knob hands free.