I first tried plugging my preamp out to my soundcard line in. This gave a buzzing sound.
So I tried to simplify and plugged my guitar to the mic in. Also a buzzing sound.
It's not interference picked up by the guitar because if I use it from the same place(in front of the computer) through the guitar amp there is no buzzing.
What could be wrong? My guitar is a
Godin LGX and the sound card is a Fortissimo II.