Hi all ! Recently, I bought some new in-ear headphones (Beyerdynamic DX 160 iE), and I discovered something really annoying when I'm connecting them to my Surface Pro 2. I can hear a little electric noise, which can be stopped if I touch a metallic part of the Surface Pro. This problem only occurs when the Surface is electrically connected. I tried to connect a external soundcard (Steinberg UR-22) to see if the problem was always here, and... Yes. So I started to think this was coming from my headphones, but I tried many others devices, and no problems. So I tried to connect a middle quality audio headset to the Surface Pro, and the problem was also here but not so audible (this surely differs with the headphones/headset style). Is there any way to stop this annoying problem ? Am I the only one with this issue ? Do I need to change my charger ? Thank you !