Störande brus i Roccat kave hörlurar

I recently contacted the Roccat Support because I were having trouble with an annoying beep when the headset was supposed to be quiet. Here's the reply:

"This phenomenon can happen with surround headsets which are not only connected to the PC by USB, but also via analog input (jack plug). This sound is in fact caused by electromagnetic pulse. Such a thing is happening when electricity is running thru metal. If the components (i.e. your soundcard) are build close together, then it can happen that these audio signals are being transmitted.

Some sound cards have an option which is counteracting this known problem. This option is called "PC Beep". Please have a look into your audio settings which you can find in the system management. Or into the driver of the sound card."

And yes, it solved the problem! All you need to do is to mute the "PC Beep" level. If you're having problem with this, check these images out:
http://img51.imageshack.us/img51/338/pcbeep1.jpg
http://img11.imageshack.us/img11/4503/pcbeep2.jpg