Asus Xonar HDAV1.3 Slim User Manual page 44

6.10.2 Under Windows Vista
Dolby Headphone (Virtualized 5.1 surround sounds over stereo headphone)
1. Open TotalMedia Theatre > Setup > Audio.
Select 5.1 Channels in Audio Output Mode.
.
3. Press Apply first, and then press OK.
4. Open the Xonar HDAV Center.
Select 6 Channels in Audio Channel.
5.
Select FP Headphone in Analog Out.
6.
Check Dolby Headphone.
7.
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ASUS Xonar HDAV Slim