yes what card did you get (model), i'm interested in this also! as I could split the cable connection at the computer and run a tv line so I watch some tv on the computer! please let me know if you fix the no audio problem!
my suggestion would be the same as everyone else' just make sure the audio out is pluged into the audio in on the sound card! hope you find out what it is soon!
as I could split the cable connection at the computer and run a tv line so I watch some tv on the computer! 
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