Dell Inspiron 14R (N4010, Early 2010) - Manual (Page 211)

Multimedia
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3 Click Settings→ DVD→ DVD Audio Setting.
4 Click the arrows beside the Speaker Configuration setting to scroll
through the options, and select the SPDIF option.
5 Click the Back button once, and then click the Back button again to
return to the main menu screen.
Enabling S/PDIF Digital Audio in the Windows
Audio Driver
1 Double-click the Volume icon in the taskbar.
2 From the Volume Control window, click Options→ Advanced Controls→
Advanced.
3 Click the check box to enable S/PDIF Interface.
4 Click Close→ OK.
Setting up the Cyberlink (CL) Headphones
NOTE:
The CL headphone feature is available only if your computer has a DVD
drive.
If your computer has a DVD drive, you can enable digital audio through
headphones for DVD playback.
1 Click Start→ All Programs, and click the option for the DVD player for
your computer.
2 Insert a DVD into the DVD drive.
If the DVD begins playing, click the stop button.
3 Click Settings→ DVD→ DVD Audio Setting.
4 Click the arrows beside the Speaker Configuration setting to scroll
through the options, and click Headphones.
5 Click the arrows beside the Audio listening mode setting to scroll through
the options, and click CL Headphone.
6 Click the arrows beside the Dynamic range compression option to select
the most suitable option.