Hi! i bought a ibanez pd7 overdrive pedal like a month ago and i noticed that every time i put it into overdrive it sounds like farting when i play low notes. It doesnt happen when it is in distortion or clean. The noise dissapears a little bit when i cut the low end but i dont want to cut the low end. It isnt the pd7 batteries or my bass batteries, i have already changed them. Btw i own an ibanez gsr200 active pickups and an ibanez IBZ10B 10 watts amp. I also tried out different cables. Can anyone help me?? =P