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i have a lip sync issue when audio is ran through the tv :-(

post #1 of 7
10/19/09 at 1:08pm
Thread Starter 

ok so i have an lg 47" 1080p 120hz lcd hd tv, which has multiple hdmi inputs. i tried to run my cable box, xbox 360, and blu-ray player to the tv and use the tv's one dedicated optical out for the audio (which i then ran to my yamaha receiever). thought this would work great but unfortunately i have a voice sync issue when its set up like this. it's pretty close but i can definitely tell when people talk the lips don't match there mouths moving. If i run the cable box, blu-ray player, or xbox 360's dedicated optical out straight to the yamaha receiver then i dont have this lip sync issue anymore. now i would just run all 3 units to the receiver and forget going through the tv however i only have 2 optical audio inputs on the back of the receiver.

At this point i'm not really sure how i can make this work the way i need it to. is there by chance a way i can adjust the audio timing from one of the tv's menu's?

The audio menu has these options (ok it has more but these are the only ones that look like they might actually do something useful)

Auto Volume    :Off
Clearvoice II      :Off
               Level [------|------]

Sound Mode    :Standard
                      :SRS TruSurround XT    :Off

any other suggestions? maybe i'm missing something simple here, i dunno.
    

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post #2 of 7
10/19/09 at 1:53pm
The best setup for this is to run the audio directly from the source to the receiver.  Not only is there sometimes a sync issue with the optical out from the TV, there are very few TV's on the market which pass DTS/DD from the HDMI in to the optical out.  Usually it is a downmix 2.0 PCM for anything but the internal tuner, so the best you could get from your cable box and BR would be Pro-Logic surround. 
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post #3 of 7
10/19/09 at 2:00pm
Quote:
Originally Posted by 97tunedmustang View Post

ok so i have an lg 47" 1080p 120hz lcd hd tv, which has multiple hdmi inputs. i tried to run my cable box, xbox 360, and blu-ray player to the tv and use the tv's one dedicated optical out for the audio (which i then ran to my yamaha receiever).   

TV's aren't built to do that. They aren't supposed to daisy chain connections like that.
The optical output on the tv is for getting 5.1 surround from your local HD channels, using the internal tuner, while using an antenna. That's all.

Some tvs will pass audio that way, but they down mix it to 2.0, to send to the receiver. Then, the best you can get is Dolby Pro Logic II (simulated surround).

What model Yamaha do you have? What model BD player do you have?
You can always get something like this: http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10423&cs_id=1042302&p_id=2946&seq=1&format=2, but let's see if we can work something else out first.
Again, model numbers will help.

EDIT:
Jeff..........you beat me again!
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post #4 of 7
10/22/09 at 11:47am
Thread Starter 
receiver is model HTR-5930

blue ray player is a panasonic dmp-bd60k

i didn't realize they made optical switches like that. that may end up being the best route for me to go.
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post #5 of 7
10/22/09 at 3:32pm
Ok, since the BD player doesn't have 5.1 multi-channel analog outputs, you're not going to get the HD audio from BD movies.

Digital cable boxes usually have a digital coax output. It is an RCA type of connection, usually color coded black or orange. It may even say coax over it. Your receiver has one digital coax input. If the cable box does have the coax output, you can use that for cable, and the two optical for the Xbox and BD player. Then you won't have to buy the optical switch. If the box doesn't have a coax output, you will need the optical switch.

Your receiver has 5.1 multi-channel analog inputs. If you get a BD player with those outputs, you can listen to the HD audio from BD movies, and get rid of that optical connection, and not need the switch. A BD player is more expensive than the switch, but you'll get the HD audio, which isn't possible over optical. Just some more things to think about...........
Good luck!
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post #6 of 7
10/23/09 at 5:17pm
Thread Starter 
interesting. so if i don't get hd audio from the optical audio out what does come out of there? is it still 5.1? i thought optical was the better route to go over standard analog cables. guess i was wrong there. home theatre is definitely not my forte lol.

in the meantime i will check the cable box for the coax audio out you were talking about. my old dvd player used that type of connection and i had it running to the receiver so i know what you're talking about. i don't think getting another blu-ray player is going to happen anytime soon so i'm thinking that the optical switch is my best bet for now.
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post #7 of 7
10/23/09 at 6:16pm
With an optical connection, or digital coax, you get regular Dolby Digital and DTS 5.1/6.1, which is good. It's just not as good as the HD audio formats (Dolby TrueHD and dtsHD Master Audio). With HD audio, you can get up to 7.1 discreet channels of surround (on several BD movies), which isn't possible from regular DD or DTS. Regular DD and DTS are "lossy" (compressed) formats. Dolby TrueHD and dtsHD MA are "lossless" (uncompressed) formats. Uncompressed audio is better than compressed audio..........

Optical and digital coax is much better than a stereo analog connection. They may even be better than 5.1 multi-channel analog connections, when watching a regular dvd. But they aren't even close to being better than the 7.1 multi-channel analog connections, when watching a BD movie.

If you have the digital coax output on the cable box, you won't need the optical switch. Otherwise, you will...........
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