Right click volume/speaker icon in lower right corner of screen, playback devices. make sure HDMI is default, click properties make sure everything is ok there. Also AFAIK DTS-HD is handled by the GPU chipset drivers, so make sure you are using either the latest amd display driver.
EDIT: Basically what vasilich said.
Also - I think you need HDMI1.3+ spec cable, so if your HDMI cable is really old (pre 2006ish) it might not work ;p
EDIT: Basically what vasilich said.
Also - I think you need HDMI1.3+ spec cable, so if your HDMI cable is really old (pre 2006ish) it might not work ;p
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