An Envelope Filter with attitude! If you are in need of a creativity inspiring pedal, this could be it.

From DBA: This mangled, filter-sweeping, abruptly overdriving pedal is designed to respond to your playing. It syncs its wave-thumping movement with the force at which you play. It multiplies dynamics into a hyper-exaggerated frenzy. It adds just the right amount of movement to punch through the mix and it reacts to an external trigger of your choosing to follow your tempo. Six selectable frequency ranges mean you're always gonna have just the right quack and oomph for whatever's plugged in! The sounds are wild, the thump is thick, and the animation is deep.

Specs:
Input: Plug an instrument in to this jack.
Trig: Plug another instrument in to this jack and use it to trigger the filter sweep.
Out: Connect this to the amplifier.
Sensitivity: Determines the point at which the filter engages and the frequency range of the filter shift in relation to the input amplitude.
Intensity: Simultaneously blends in the resonance, amount, and grit of the filter.
Vol: Adjusts the output volume of the DEEP ANIMATION.
Frequency Selector: Selects the frequency range of the filter.
Bypass: True bypass the effect.
Up / Down: Controls the polarity of the filter decay once triggered. UP sweeps the frequency from higher frequencies to lower ones and DOWN, the opposite.
Additional Features: There is a subtle light to indicate the external trigger behind the main bypass LED.
Dimensions: 5.92" x 4.72" x 2.34" (including hardware).
Weight: 21 oz.
Power:9V (runs on standard 2.1mm negative center 9V adapter or included 9V battery).
Current Draw:18 mA.