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- 08-04-2011 10:03 PM #1
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Best Sound quality: HDMI or Optic cable
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I have my an HDMI run from my 722K receiver to my Denon receiver, and another HDMI from the Denon to my TV. Would I get better sound on my 5.1 surround system if I run optical from the 722 to the Denon? I noticed when I run optical the Denon shows Dolby Digital on the front. But when I run HDMI only the Denon says "multi channel in". Is one method preferred over the other?
- 08-04-2011 10:03 PM # ADS
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- 08-04-2011 10:14 PM #2
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Proud Staff MemberStrange, I get Dolby with my Directv & Denon in the Bedroom (use optical for dish, not enough HDMI inputs) it reads Dolby also...
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- 08-04-2011 11:40 PM #3
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With optical/coaxial digital audio, you will receive only the core channels of Dolby Digital 5.1 or DTS 5.1. With HDMI you can receive the lossless multichannel codecs - Dolby TRUEHD and DTS MasterAudio with up to 7.1 channels of lossless audio. HDMI is definitely a step up from optical/coaxial audio. However, for the present, if all you are running to your receiver is your 722, it won't matter, as DISH and Directv only broadcast in DD 5.1, and, on some channels, DD 2.0. But, you're still better off with HDMI.
Last edited by HiDefRev; 08-04-2011 at 11:50 PM.
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- 08-05-2011 11:18 AM #4
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HDMI by
Originally Posted by smokey982 
spec
can carry decoded audio (LPCM) just as it does encoded (DD, DTS in all its flavors).
What you noticed means the audio has been decoded in the 722 and is being sent to the Denon as LPCM.
With optical you leave the decoding job to the Denon.
The possible difference in audio quality would depend on the HDMI cable and who does a better decoding job...
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- 08-05-2011 11:34 AM #5
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Any way of knowing which would do the better job? It's a Denon 1909 and a 722k.
- 08-05-2011 11:50 AM #6
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Proud Staff MemberLet your ears decide...
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- 08-05-2011 12:02 PM #7
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That's always my advice, especially when it comes to speakers! Originally Posted by dfergie Let your ears decide...Chip
- 08-05-2011 12:27 PM #8
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Proud Staff MemberExactly! everyone's senses are different... Originally Posted by raoul5788 C-Band FAQ's, The List, SatelliteGuys Cutting Edge, Home Theater Equipment, Primetime,
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- 08-05-2011 12:52 PM #9
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In theory I'd expect the Denon to do a better job. Originally Posted by smokey982
As a rule of thumb, I prefer to keep both video and audio in the digital domain right until the end, i.e. receiver in your case.
But by the time the DD stream arrives at your place it is most likely mangled enough to not make a difference in practice...
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- 08-05-2011 12:58 PM #10
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Remember, not all channels on Dish are 5.1. Mostly HD locals, premiums, and PPVs. Not even all of the HD channels are 5.1. Even then, not all programming on those channels is 5.1. Dish sends 2 channel audio as PCM. It is then up to the user to set the receiver to apply Pro Logic II to simulate 5.1. 5.1 is automatically detected as DD 5.1 by receivers (unless you've made changes within the receiver). (Hence the DD/PCM setting in the setup menu).
S~
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