Asus Xonar U1 Lite User Manual page 22

6.2.2 Analog Out/Speaker Test
No Item
1 Analog Out
2 Speaker Test
16
1 2
Description
The Analog Out setting is used to match your actual speaker
setting, such as headphones, 2 speakers (or 2.1). Xonar
U1 will play the channels and does the proper 3D/Dolby
sound processing accordingly. Select the correct speaker/
Headphone type for your connected speakers/ Headphone.
Click this button to show the speaker test window in the right
pane. Click the "play" button to test each speaker one by one
or click each speaker manually to test.
(note: the Speaker Test function is not available on Windows
Vista due to a limitation in its audio stack.)
ASUS Xonar U1