I know it may sound odd.. But once in awhile my I hear a roaring sound out of my headphones. I tried opening the volume mixer and trying to see where it comes from but just when I tried it wouldn't make the sound. It's driving me mad , my friends start to think I hear voices in my head,,, BTW I wasn't quiet sure about the forum to post that in since I don't know where is the source of the problem at all. I'll be glad if you could help.