Dell Inspiron 8600 - Manual (Page 84)

84 Using CDs, DVDs, and Other Multimedia
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Enabling Dolby Digital 5.1 Audio for DVD Playback
If your computer has a DVD drive, you can enable Dolby Digital 5.1 audio for DVD playback.
1 Double-click the InterVideo WinDVD icon on the Windows desktop.
2 Insert a DVD into the DVD drive.
If the DVD begins playing, click the stop button.
3 Click the Properties (wrench) icon.
4 Click the Audio tab.
5 Click Enable S/PDIF output.
6 Click Apply.
7 Click OK.