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They didn't install for me when i downloaded and installed the Cat drivers from the ATi site, so i just popped the driver CD in that came with the card and did the old search through that, and it found them on there and installed them.
EDIT: You can get them from the Optional Downloads on the driver download page, click on Individual driver download packages, ATi Multimedia Centre, AVIVO, and Korean full package, then under Optional Downloads again on the next page, ATi HDMI Audio Driver for ATi Radeon HD series products is what you want.![]()