Answer
Please follow the guide below to enable HDMI audio.
1. Please enter "CMOS Setup Utility/Advanced Chipset Setup" to "Enabled" HDMI Audio function as below picture.
![](http://www.ecs.com.tw/ECSwebsite/images/pin/HDMI.bmp)
2. Select "Digital Output Device (HDMI)" of playback device under Windows Control Panel as below picture. (Please note that below Sound setting under Vista OS for example.)
![](http://www.ecs.com.tw/ECSwebsite/images/pin/hdmi1.jpg)
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