The DOD 440 Envelope Filter is back, bringing vowel-like filter sweeps and reactive auto-wah tones to your pedalboard. The filter responds directly to your pick attack, producing slow, expressive sweeps that follow your playing dynamics. An Up/Down switch lets you choose the direction of the sweep — Up for the classic envelope quack that guitarists love, Down for the deep, dub-style sub thunder that bassists favour.

True bypass keeps your signal completely clean when the pedal is off, a notable improvement over the original which coloured the bypassed tone. A modern 9V DC power supply input makes it straightforward to integrate into any existing pedalboard setup.