From what I remember it has always been there... It just is a lot more noticible hooked up to the DT50. I really think it is my hd500x. It will be faint until I touch the stings and then it comes back. I can maintain it by changing the inputs and the input z settings as well as lowering the db in the mixer... For some reason I feel I need to factory reset the HD because it may be that I have uploaded a corrupted patch somewhere down the line. I will give an update when I get around to messing with it later in the day. BTW. Thank you guys for all your help and didn't just tell me to "search around the forums." Because I actually have been trying to diagnose this for over two weeks looking into multiple forums. I finally cracked down and decided to post something.