Question Trouble setting 5.1 audio through Samsung TV

[Danicco]

I recently changed TVs since my old one was dying, and I have a setup like this:

PC ---(HDMI)---> TV ---(Optical)---> Home Theather
Videogame -----> TV

On my old TV, a Sony X850C, I had the 5.1 option in the Sound Settings.
Now I switched to a Samsung Q80 and the only option in the Sound Settings is Stereo.

I checked the NVidia Control Panel to see if HDMI Digital Audio is enabled for the Samsung, it is, and from this link at rtings site, I'm assuming this Q80 can passthrough 5.1 audio, but I can't find out why I can't set it on Windows.
Is there anything I'm missing or that I can do to enable it?

Edit: After a lot more googling I think the issue is that Windows only recognizes DTS for 5.1+
Since this TV doesn't have DTS support I guess I can't output 5.1 through it...

 

[boju]

Your Sony TV had an realtime encoder to compress HDMI audio to fit through the optical cable and your receiver then decodes it. This particular Samsung TV doesn't have an encoder to do the same. Optical cables doesn't have the bandwidth like HDMI cables do so compression is needed.

You'll probably find if you played a DVD 5.1 movie with audio already compressed on the disc, your TV would pass this track along and your HT should play all surround channels. Unfortunately, Windows doesn't compress audio via HDMI.