WMD Fatman Envelope Filter



The WMD FatMan is a funky envelope filter providing massive tweakability. The FatMan produces a vast range of filter sounds with intuitive, wide range controls. The FatMan is an incredibly powerful device with the quality expected in a boutique pedal, plus some original features for players on the cutting edge of musical innovation.


  • Fat & Warm Pure Analog Circuitry
  • 12 Filter Frequency Ranges
  • Tweakable Filter Feedback
  • Lowpass & Bandpass Filter Mode
  • Reverse Sweep
  • Tweakable Attack Speed
  • Internal Gain Adjustment
  • Key Input
  • Hand Wired True Bypass
  • Violet LED
  • Top Quality Components
  • Super Hard Epoxy Powder Finish
  • Standard 9V Power Jack

The Controls. The FatMan's controls are intuitive and effective in sculpting your desired filter sound.

  • Attack - Adjusts the speed of the filter, and how fast it responds to transients in your playing. Fully slow opens the filter like a nice sweep on the wah pedal. Fully fast will open and close the filter nearly instantly making the attack of each note very pronounced. Fast attack will also move the filter around during note bending and the beating of slightly out of tune notes.
  • Threshold - Adjusts the volume sensitivity of the filter. Turning it up causes the filter to begin working sooner, or at lower levels. Adjusting this lets you control the frequency that the filter opens up to in a given range.
  • Feedback - Controls how much you hear the filter working. Turning it up adds more of the frequency the filter is moving at to the sound. All the way down and the Fat Man subtly removes frequencies like a moving passive filter. Turn it up and the filter becomes more audible. Dime it and you'll be able to make it quack and thump depending on where the range is set.
  • Range - Selects between 12 distinct frequency ranges, controling the tone of the filter. The lowest setting goes down to 20Hz and provides movement in the sub-bass frequencies. The highest range tops out at 7kHz. Each range has its own sound and response characteristics.
  • Sweep Up/Down - Controls where the filter starts and moves to. When in "up" mode, the filter startes at the lowest frequency and as volume increases, the frequency moves up. When in "down" mode, the filter is at its max frequency for the range and moves downward as the volume increases. Down acts as a tone compressor.
  • Lowpass/Bandpass - Changes the way the filter affects low frequencies. Lowpass mode is more subtle affecting only the highs in the signal. Bandpass mode sounds more like a wah pedal, allowing only a narrow band of sound through. Bandpass mode has much more feedback and a very strong sound.
  • Bypass - The stomp switch enables and disables the Fat Man. When bypassed, the Fat Man will not touch your tone. True bypass wiring means that your signal goes in and right out instead of being degraded by unnecessary electronics. Good stuff.
  • Internal Gain - This control lets you set the output volume of the Fat Man. The Fat Man can put out a lot of level, so turning this down will clean up the signal for the device following the Fat Man. Turning it up will add some extra juice for driving quiet devices. This control doesn't affect the Fat Man when bypassed. Use this if you need the FatMan louder or softer than the input signal.
  • Key Input. The key input lets an external source control the filter. For example, you plug a drum machine into the key in it automates the wah FatMan. Or, hook a mic to the Key In and put it in your drummer's kick drum and plug the bass into the main in; the kick and bass work together to create a new sound. The Fat Man's versatility is intended to spark your creativity. There are literally hundreds of things that can be pluged into the key in to create new and interesting sounds. Getting the most out of the key input requires proper setting of the Attack and Threshold controls. If the attack is too slow, the filter won't move around much. Set the threshold to get the desired amount of movement.

Construction. The Fat Man is made from milled die-cast aluminum and then powder coated purple and lettered with bright red epoxy paint. This makes the Fat Man easily stand up to the rigors of the road. Plus, a voilet LED tells you when the Fat Man is engaged.

Only the highest quality components are used in the electronics, simply because the sound better. Less noise and distortion are the goal. Each pedal is extensively tested for low noise and sound quality.

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