Electrix Filter Factory - Analog High Order Filter


  • Buzz
    Sets the amount of distortion. The more buzz, the more distortion you will have. Buzz will take you from subtle, at the farthest left, to heavy distortion at the farthest right.
    NOTE: Buzz will increase the level of your output signal substantially as you turn it up. Use the Trim control to get the level back to where you want it while the Buzz circuit is engaged.
  • Buzz Engage
    Toggles the buzz circuit in and out.
  • Buzz Momentary
    Temporaily engages the buzz circuit. This is useful for tapping patterns to create distortion hits and rhythms.
    Note: When an effect is engaged, the Momentary will dis-engage it, when an effect is not engaged the momentary will engage it.
  • Buzz Trim
    Sets the output level of the Buzz circuit. This can be set anywhere from inaudible to extremely loud. Use with caution.
  • Stereo Filter Frequency
    Sets the resonant frequency of the stereo filter. Use it in conjunction with the resonance control. The more resonance you use the more distinct any changes you make with frequency will be. The frequency tuning range of the filter covers a 12 octave range from 10 Hz to 40 kHz. The External CV input can control this and has been adjusted to provide standard 1 Volt/Octave response.
  • Stereo Filter Resonance
    The FilterFactory operates in a Stereo 2 Pole filter per channel mode, (unless you switch to 4 Pole mode). When in Four Pole mode, the FilterFactory switches into Mono operation by summing the left and right channels before the 4 pole filter. A two pole filter will give you a gentler response, in technical terms it is defined as a 12dB/octave filter. A 4 pole or 24dB/octave filter will give you a much steeper filter response that will sound more pronounced.
  • Stereo Filter Type
    This control selects the basic sound of the filter. Each filter type has a unique sound. You will find situations where each one offers you a unique effect on a given signal.
    • The High Pass will roll off the bass of your signal. It will make things sound thinner.
    • The Band Pass filter acts like Wah pedal and puts a peak in the middle of your signal. This is great for hilighting certain frequency ranges or for creating a sweeping sound with the frequency knob.
    • The Notch Filter works the exact opposite of the Band Pass filter. It puts a notch in your signal, essentially killing a small frequency band. This effect often sounds like talking through a pipe. It will also create unique sweeping sounds, (that is similar to a phase shifter) when used in conjunction with the frequency knob. For best Notch result put the Resonance knob fully counter-clockwise.
    • The Low Pass Filter is the most commonly used filter type. This is the kind of filter you will find on vintage synths and envelope followers. It is useful for controlling the amount of harmonics or the brightness of a signal. As you sweep the frequency control, try adding some resonance to make the cutoff frequency more audible.
  • Stereo Filter Engage
    This control toggles the filter on and off. Turning this on restarts the LFO or triggers it if it is in single shot mode.
  • Filter Momentary
    This switch temporarily engages the stereo filter. Try using it to tap rhythmic patterns while adjusting the frequency knob. Pressing this button also restarts the LFO.
  • Stereo Filter 4 Pole Mono
    This controls the level of the peak at the resonant frequency of the filter, i.e. the frequency you dialed in with the frequency knob. FilterFactory was designed to create extreme effects, so be careful because the resonance control is able to cause the filters to self-oscillate at higher settings. Self oscillation produces a loud tone at the resonant frequency. It sounds a lot like sustained feedback.
  • LFO Waveform
    The LFO provides the following cyclic (or repetitive) waveforms: Sawtooth, Inverse Sawtooth, Triangle, Square Wave, Envelope Follow and Random. If you increase the LFO depth and turn the LFO speed up a bit you will be able to hear their effect on your frequency setting.
    Note: Although ENV Follow isn’t a waveform we put it here anyway. To get it working, select ENV Follow, set the frequency down to 115Hz, on a Low Pass Filter, set your resonance to 7.5 and adjust the LFO depth to taste.
  • LFO Singleshot
    This button changes how the Filter and the LFO Sections on your FilterFactory. Singleshot gives you the ability to trigger Filter Effects in a simular way that playing a note on an old synthesizer will trigger VCF and VCA Envelopes. The FilterFactory Singleshot Envelopes are borrowed from the LFO section. When single shot is on, Triangle, Sawtooth, and Inverse Sawtooth all become triggerable envelopes. The Division button allows you to select how many time the waveform envelope will trigger. LFO Speed adjusts the duration of the envelope, and the Filter Momentary triggers the envelope.
    Note: Singleshot does not work when the ENV Follower is selected.
    Note 2: If the Filter is not engaged, the Singleshot does not automatically finish the waveform.
  • LFO Tap Tempo
    The tap tempo button is another way to control the LFO rate to match the beat of your music. When it is hit one time, it will restart the LFO at the beginning of its waveform. If it is hit twice within 2 seconds, then the time between presses is used as the new rate or tempo. It is hit 3 or more times, it will average the time between presses to come up with a more accurate tempo.
  • LFO Depth
    This controls the amount the LFO changes the filter frequency.
  • LFO Speed
    LFO Speed controls the period of the LFO waveforms by changing the frequency of the LFO. The LFO Frequency range covers 0.1 Hz to 100 Hz for subtle to extreme effects.
  • LFO Division
    The LFO rate, as defined by Tap Tempo or MIDI clock can be divided (or doubled) using this control. The actual rate is indicated by the flashing tempo LED.
  • Global Effect Mix
    Controls the Mix of the Buzz and Filter Sections in relation to your dry signal. 0% is all dry, or the same as bypassing the FilterFactory. 100% will be all FilterFactory and none of your dry signal.
  • Global Bypass
    Bypasses both effect blocks.


the Electrix brochure

Put the analog edge back into your sound. Run keyboards, samples or guitar tracks through the FilterFactory and you'll get everything from thick, retro filter sweeps to sub harmonic rumblings or even tweeter-shredding mayhem.

Four Filters types Low pass, High Pass, Band Pass, and Notch filters.

LFO (low frequency oscillator) with beat divisions syncable to tap tempo or MIDI clock.

Five waveforms types sawtooth, inverse sawtooth, triangle, square and random.

Distortion gives you everything from a bit of extra punch to in-your-face buzz.

Smooth Analog Sounds with Full MIDI automation.

MIDI in out and thru lets you automate and sequence every single control setting and movement.

Electrix (2001)

Take live or sampled drums and cram them through the FilterFactory. Suddenly your track has a throbbing BigBeat groove. Run a bass line through the same filtered settings and your rhythm section comes out tight and pumping. Breathe some analog life into any gital synth just by running it through the FilterFactory.

Get everything from thick retro filter sweeps to sub harmonic rumblings or even tweeter-shredding mayhem. Extreme sonic shaping is the bottom line.

    "...Mind bending results are almost guaranteed." - Guitar Player Editors Pick


  • 101 Flavors. Remix your tracks and explore infinite variations just by twisting the FilterFactory's knobs.
  • MIDI controlled filter, so you can automate and sequence every single control setting and movement.
  • Get a Buzz on? The buzz section gives you everything from a bit of extra punch right through to the `in your face` sound of bands like "Nine Inch Nails, or the Chemical Brothers.
  • Can you dig it? Similar to the old hybrid synths of the 70's, FilterFactory is a true analog filter design with digital control.
  • How low can you go? Extreme resonance and cutoff frequency control canmake any frequency sub-basement low or stratospheric with mind numbing self-oscillation.
  • Four Filters in one. Choose between Low pass, High Pass,Band Pass, and Notch filters.
  • The LFO (low frequency oscillator) Beat Divisions makes for instant groove changes.
  • Five waveforms to choose from: saw tooth, inverse saw tooth, triangle, square and random. All synch to Tap Tempo or MIDI clock.
  • Single Shot ADSR emulator lets you play the filter without needing a keyboard.
  • Filter's CV input allows most old monosynths to control the FilterFactory's frequency and track the notes you're playing.
  • 4 pole provides a big beefy Mono sound. 2 Pole provides a more controlled stereo signal.

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envelope-controlled envelope follower amplitude controlled low frequency oscillator lfo-controlled midi-controlled midi controllable over midi by midi gate s-trigger trigger voltage-controlled foot-controlled threadle wah rackmountable rackmount filter eq/excite/filter lowpass lopass lo-pass lp lpf low-pass filter hpf hipass hi-pass highpass hp high-pass filter bandpass bp bpf band-pass filter notch filter taptempo
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