![](http://pdfasset.owneriq.net/5/ad/5adf31e0-1eba-4b39-8914-824e6e9c0e6c/5adf31e0-1eba-4b39-8914-824e6e9c0e6c-bg3a.png)
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ASUS Xonar D1
4. Go to the Sound Card tab and select “DirectSound” as the Driver Model
(because Windows MME mode doesn’t support high-resolution 24bit audio
playback and the data may be manipulated by Windows so that the real
hardware quality can not be measured properly.)
5. Click loop-back mode test button
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