What finleysound said is correct... feedback and noise are different. I know the gate works on my FX8, but it only gates noise. No amount of gating will take care of feedback issues. Feedback is generally from using too much gain too close to the amp, or from trying to use too much gain with pickups that are poorly potted. Are you talking about squealing feedback, humming feedback or what. (Poorly potted pickups tend to squeal mirophonically, but if it's just a matter of too much gain too close to the amp, it is usually more of a humming sound... still different from noise.) These are only generalizations, and there are other things that can cause feedback, just sharing what I have experienced over the years with my own guitars. Years ago when I swapped my cheap stock Ibanez pickups out for some decent Tom Anderson's my guitar went from uncontrolled squealing to a controllable hum that only occurred when I would get close to my amp with some pretty loud volume going.