Everything has been running smoothly with my X-FI HD USB card. However today, when i plugged my headphones into the jack on the front, as i usually do, I could here white noise. I've never had this problem before. I don't know whats causing it. It is very loud. However when you play music, you don't notice it.
I played around with the mixer and discovered the noise dissapears when i mute the "mic/line/phono-in".
Why is this? Why now after it was fine before.








