It's probably a problem in both Windows software and the sound card hardware. The Windows problem is fixable by Windows Update, yes, but I think the sound card needs some equivalent of HDCP for the audio. To my knowledge, no current sound card has this chip. Think of the whole HDCP fiasco with the video cards from a while back. I think it's like that, but for sound cards.
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It's probably a problem in both Windows software and the sound card hardware. The Windows problem is fixable by Windows Update, yes, but I think the sound card needs some equivalent of HDCP for the audio. To my knowledge, no current sound card has this chip. Think of the whole HDCP fiasco with the video cards from a while back. I think it's like that, but for sound cards.