This problem just started happening. When I plug in my speakers or headphones into my soundcard jack, they make a hissing noise. Even when I'm not playing any music (when I do play music I still hear hissing). My soundcard is a C-Media CMI8738/C3DX Audio Devic PCI. I have Altec Lansing speakers hooked up to the card and I have Sennheiser HD 497 headphones.
I've tried using other speakers and headphones in the same jack, still hissing. I've tried my speakers and headphones in my mp3 player and then they don't hiss. Tried my Mac, no hissing. This must be something with my soundcard.
Does anyone know how to get rid of the hissing?
Thanks in advance,