I found this thread
here and on first page, post #10 there was a driver that should be exactly what I need for my notebook. Sadly the file is gone now, does anyone still have it and can repost it?
I posted all details about my sound card on the last page of the mentioned thread, post #60, but there was no answer to it for three weeks now.
It would really be nice if someone can help me, everything is working fine but sound which is crackling with the drivers supplied by windows update.