Asus Xonar U3 User Manual page 18

8.2.4 Audio Channels (For Win7/Vista only)
This setting only appears in Windows Vista / Windows 7. Windows Vista / Windows
7 will deliver the audio channels to the audio driver according to this setting,
no matter what the original audio content is or how many channels they have.
Therefore, you need to set this in accordance with your audio content before you
play it. Please note that this setting is synchronized with Vista's system speaker
configuration and changing the setting during playback will cease the audio
playback program. You may have to restart the program after the change. It's
recommended that you close all playing programs before you change the setting.
No Item
1 Audio Channels
12
1
Description
Here are some typical suggestions:
- MP3, WMA, AAC, CD, VCD, 2D games => 2 channels
- DVD-Video with Dolby Digtial or DTS 5.1 => 6 channels
- DVD-Video with Dolby Digtial EX or DTS ES => 8 channels
- 3D games => 8 channels
ASUS Xonar U3