Realtek audio line output to optical input

Where is the TOSLINK digital output source?

All I see are analog, 3.5mm audio sources.

Pretty sure you need a sound card with the appropriate TOSLINK output, then have to setup that properly in software (including video players likely).
 

stupiddimbulb

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Jun 5, 2012
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Thanks for your help. I suppose I need to get a sound card then. I picked up a Xonar DG but it doesn't pass through 5.1 audio (only 2.1 pcm). Any recommendations?