Do you have an onboard audio port you can check? If so and it gives you static still, then it could be a power source issue, or perhaps the motherboard. Power surges could also cause static. Alternatively, it could be electromagnetic interference... like from a microwave or vacuum nearby. I've noticed this on some computers.
If you don't have onboard to check with... do you have another card you could swap in (perhaps a friend's)? If that works, then it's the card.
You could also install new drivers, which sometimes helps. This is probably the easiest solution. Also, does the static occur in only one program, or globally? If it's only one program, then it's almost guaranteed to be a driver issue.
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