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5.1 not working when connected to TV via hdmi then optical out

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February 14, 2012 7:39:03 PM

5.1 not working when connected to TV via hdmi then optical out to reciever

my set up:
radeon 6570 hdmi out to LG tv
optical out to surround reciever, result =stereo sound!

i have the exact same set up with my xbox
hdmi to TV,optical out to reciever= 5.1 surround!!


why won't i get surround this way from the pc card??
February 14, 2012 7:42:05 PM

Also when i go to sound options/configure hdmi output in control panel, the option for surround is greyed out!
February 14, 2012 8:37:18 PM

Because optical can only transmit 2 channel uncompressed sound, or a surround sound container format like Dolby Digital or DTS.

Your PC is transmitting 8 channel uncompressed sound via HDMI. Your xbox is transmitting Dolby Digital.

Hence, you only get 2 channel from your PC, and surround sound from your xbox.
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February 14, 2012 8:45:10 PM

thanks for that info!.. so how would i get surround sound from a hdmi lead when that has to go into the tv for the picture signal?

buy a better reciever with hdmi input/output?

plug it into that and then output via another hdmi cable to the tv for the picture?
February 14, 2012 8:48:23 PM

You need to route the pc hdmi output to a receiver or an audio/video processor, which connects to the tv.
March 5, 2013 2:45:19 AM

I have done this, and it still only allows stereo setup.
April 17, 2013 5:14:15 PM

Schwahman said:
I have done this, and it still only allows stereo setup.


Did you find a solution to this? I have a similar setup:

Radeon 7870 --- HDMI --- LG AV Receiver --- HDMI --- Sony TV

The same setup with my PS3 connected instead of my computer outputs great 5.1 surround sound with no configuration needed. When I hook up my computer, Windows only gives me the option for stereo. It recognizes the "LGHomeTheatre" and the "AMD High Definition Audio Device". The video passes through my receiver to the TV just fine.
May 5, 2013 2:21:50 AM

Update your AMD drivers.
!