High pitched sound from speakers


On my stationary PC whenever I am not playing any sound, I a very high pitched sound instead. Whenever play a video/audio or adjust the volume it disappears, and when I stop the sound will come back normally after a few seconds. Any ideas what might cause it, and how to fix it?

Happy new year :slight_smile:

Take a look here especially at the tsched=0 part: http://askubuntu.com/questions/157891/skype-and-vlc-sounds-sizzle-distorted-bad