I have been using an older desktop pc as my htpc. I recently added a hauppauge 2250 for recording clear qam channels I receive through the cable line for free. The recordings are working great and have all sound when viewing them through my xbox on the tv. When watching on the pc connected to the tv there are no voices on some shows. It mostly is primetime tv that is the issue. I am hearing the background noise from the shows and all sound from other shows, including the news, reruns of older shows and commercials. This is affecting the recorded shows, but I also found out when the show is playing on live tv it is missing the sound.
My setup is a core 2 quad through an asus mobo with nvidia 8800gt and hauppauge 2250 using onboard sound. There is a 1/8" audio cable running to the tv and a digital out going to the receiver. I have tried eliminating as much as possible, pc going straight to tv and playing through tv speakers but it is having the same issue, any thoughts?