Dawn,
Do you have Spatial Sound disabled at the moment? If so, does enabling it fix? If you’re still having trouble after this troubleshooting, please generate a text copy of your DxDiag using these instructions. Once you have that made, open the file. You’ll need to copy and paste the contents of the Text document into the post and put four tilde (~) marks in front of it. It’ll look like this when you’re done:
DXDiag goes here