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Tom's Guide > Forum > Audio > General Discussion > 5.1 not working when connected to TV via hdmi then optical out

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

Forum Audio : General Discussion 5.1 not working when connected to TV via hdmi then optical out

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shik1   02-14-2012 at 10:39:03 PM
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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??

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shik1   02-14-2012 at 10:42:05 PM
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Also when i go to sound options/configure hdmi output in control panel, the option for surround is greyed out!

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astrallite   02-14-2012 at 11:37:18 PM
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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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shik1   02-14-2012 at 11:45:10 PM
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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?

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astrallite   02-14-2012 at 11:48:23 PM
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You need to route the pc hdmi output to a receiver or an audio/video processor, which connects to the tv.

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