Elitegroup L373N1 v.3 - Manual (Page 22)

¦ chapter 1 getting to know the basics
1-22
How to Enable S/PDIF Digital Output
The computer is equipped with an optical digital audio output port
called S/PDIF. You will need to connect the output port to an
external DTS, AC3, or PCM audio processor in your home audio
system via an optical digital audio cable (not supplied.)
To Enable S/PDIF output, do the following:
1. Double-click the speaker (audio) icon at the right hand
corner of the task bar.
2. On the Volume Control Panel, click [Options > Properties]
and you will see the following box. Check SPDIF and press
OK. This enables SPDIF output.