ATI Radeon HD 4600 & 4800 series support 7.1 channel HDMI audio! - AVS Forum

Download and Install "ATI HDMI Audio Device" Driver You will need to install not only ATI Radeon Video Card Driver, but also ATI HDMI Audio Device driver. - If you are a Windows XP user, then download the ATI HDMI Audio Driver from the AMD website. - If y

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