edit: oops, i didnt see boogak responded as well with this 🙂
hi,
i posted a fix for this a few weeks ago 🙂 and a few other people have said that it worked. i found it purely by frustration and accident.
i turned the volume up and down just back and forth, and slowly the crackling static sound started to disappear. you might want to do it with the headphones plugged in first. i was fiddling with the volume dial and holding the headphones about 3 feet away from me. i dont know if its dust or something...