Windows 7 sound playback slower then video

microbious

New Member
Joined
Sep 15, 2009
sound playback slower then video and as it gets closer to end of the film it gets even slower.
Imagine watching a 1.:30 mins movie.
it begins OK and i notice that gradually sound starts to play slower then video so in the middle of film characters open mouth, say a word then close the mouth and only after that i hear what they say.
Sound delays with every single avi file.
Sound card is X-FI creative with latest driver.
Fresh windows installation with nothing installed but the driver
No video codecs installed (i instaled them later to se if it helps but it doesnt)
i had this problems with earlier W7 RTM releases and with official W7 release as well

Can someone help me to understand what is going on ?
Sound card is not slow, its an ASIO card for music developers. Fast and very powerfull. I payed almost $200.00 last year and it has Windows 7 driver
 
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