Distorted sound with VLC backend in KDE

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http://forums.fedoraforum.org – I have Fedora 17 KDE. I used the gstreamer backend for Phonon, but it always makes my media players stop playing when moving to the next track and sometimes in the middle of playing a track. This is a known bug with the gstreamer backend that has been around since 2009 and also affects Ubuntu and seems to be unconnected to the media player that is used. So I switched to the VLC backend which does work... But every time I log in, all sound is highly distorted at first. When I play around with the settings for long enough, it sometimes just stops and I still haven't figured out what made (HowTos)