Founded in 1974 by David Oreste DiFrancesco (who contributed the company initials) and John Johnson, Salt Lake City – based DOD became one of the major players in the burgeoning effects market of the ...

DOD Envelope Filter 440 press release DigiTech and UK distributor Sound Technology Ltd are pleased to announce the introduction of its DOD Envelope Filter 440, the classic “auto-wah” effect that makes ...

The Envelope Filter is one of the most enduring pedals from this era of DOD, simply due to its wide availability. Envelope filter and auto-wah on guitar is an effect that is niche by design. Most ...

There are no subtle wah textures; the 440 is all about in-your-face filter goodness, with a host of intuitive, faithfully recreated tones. Not a lot. MusicRadar's got your back Our team of expert ...