Say if I have a wah readily available, I would have no need for an envelope filter, correct?
Wah is controlled by the action of your foot on the potentiometer - envelope filter is controlled by playing dynamics. They are not the same, as for need, it's a personal thing.
Kirk Hammett would dissagree with you. They're not vastly expensive mate, and they can get you some awesome sounds without you having to think about your wah. i say pick a cheap one up
I use both, they have a simmilar sound usually, but they are different, a wah is used more for adding expressiveness to the sound, whereas the envelope filter makes a more mechanic sound. Some people either use one or the other, some use both, some use neither, what you need is up to you.
Ok, thank you for helping me justify plans to buy a DOD FX25 EV ,when i already have Budda Wah .