Help with Audio Sync - Blu-ray Forum

thekobrakais · 01-15-2009, 04:32 PM

I'll try to keep this simple...

I have a Sony BDP-S350 connected to my Vizio VO47LF via HDMI (1.3), but only for video, as my receiver does not have HDMI inputs. The audio is connected via optical. But here's the catch...I also have an Xbox 360 connected via optical, and since my receiver only has one optical input, I had to buy this optical switcher/splitter :

http://www.amazon.com/Digital-Optica...2038648&sr=8-6

My receiver is part of the Sony HT-DDW660, which can decode DD 5.1 and DTS. I have my audio settings on the blu-ray player to output through optical and set to Dolby Digital, DTS, 48kHZ/16bit.

I have noticed a pretty good amount of sync issues while watching a few movies with Dolby TrueHD. It doesn't seem as bad with ones that have DD 5.1, but is still there enough to be annoying.

Could the splitter be causing sync issues? Or is it my receiver taking too long to decode TrueHD to DD 5.1?

Would it help me to run the audio via the optical output of the TV to the splitter? So it would travel through the HDMI first, then go to optical?

Any help is appreciated. Oh, I forgot to mention that I've tried the AV Sync feature on the Blu-ray player and haven't really had luck.

thekobrakais · 01-15-2009, 07:34 PM

anybody?

aramis109 · 01-15-2009, 08:18 PM

Best way to tell if its the splitter is to run it directly and see if you still get lag. Many receivers also have a function to correct audio sync issues so you may want to try that as well if its available.

I'm not sure it would work running audio via HDMI and then down through optical. If anything, that'd definitely induce some audio lag.

thekobrakais · 01-15-2009, 08:43 PM

thanks for the help.

thekobrakais · 01-16-2009, 03:23 PM

I had read yesterday that changing the audio settings in the blu-ray player to downmix pcm would get rid of this, so I tried it. It worked.

The only drawback to that is that my receiver now only accepts it as 2 channel. So I'm left with the option of dolby pro logic or 2 channel, which in my opinion is NO option.

I'll adjust the AV Sync on blu-ray to match as close as possible for TrueHD tracks.

01-15-2009, 04:32 PM	#1
thekobrakais Member Member since:Jun 2008 Blu-ray collection:291 Blu-ray reviews:9	Help with Audio Sync I'll try to keep this simple... I have a Sony BDP-S350 connected to my Vizio VO47LF via HDMI (1.3), but only for video, as my receiver does not have HDMI inputs. The audio is connected via optical. But here's the catch...I also have an Xbox 360 connected via optical, and since my receiver only has one optical input, I had to buy this optical switcher/splitter : http://www.amazon.com/Digital-Optica...2038648&sr=8-6 My receiver is part of the Sony HT-DDW660, which can decode DD 5.1 and DTS. I have my audio settings on the blu-ray player to output through optical and set to Dolby Digital, DTS, 48kHZ/16bit. I have noticed a pretty good amount of sync issues while watching a few movies with Dolby TrueHD. It doesn't seem as bad with ones that have DD 5.1, but is still there enough to be annoying. Could the splitter be causing sync issues? Or is it my receiver taking too long to decode TrueHD to DD 5.1? Would it help me to run the audio via the optical output of the TV to the splitter? So it would travel through the HDMI first, then go to optical? Any help is appreciated. Oh, I forgot to mention that I've tried the AV Sync feature on the Blu-ray player and haven't really had luck. Last edited by thekobrakais; 01-15-2009 at 05:53 PM.

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01-15-2009, 07:34 PM	#2
thekobrakais Member Member since:Jun 2008 Blu-ray collection:291 Blu-ray reviews:9	anybody?

01-15-2009, 08:18 PM	#3
aramis109 Blu-ray Ninja Member since:Mar 2008 Location:Milwaukee, WI Home Theater Gallery:10 4K collection:4 Blu-ray collection:360 Trading Score:18	Best way to tell if its the splitter is to run it directly and see if you still get lag. Many receivers also have a function to correct audio sync issues so you may want to try that as well if its available. I'm not sure it would work running audio via HDMI and then down through optical. If anything, that'd definitely induce some audio lag.

01-15-2009, 08:43 PM	#4
thekobrakais Member Member since:Jun 2008 Blu-ray collection:291 Blu-ray reviews:9	thanks for the help.

01-16-2009, 03:23 PM	#5
thekobrakais Member Member since:Jun 2008 Blu-ray collection:291 Blu-ray reviews:9	I had read yesterday that changing the audio settings in the blu-ray player to downmix pcm would get rid of this, so I tried it. It worked. The only drawback to that is that my receiver now only accepts it as 2 channel. So I'm left with the option of dolby pro logic or 2 channel, which in my opinion is NO option. I'll adjust the AV Sync on blu-ray to match as close as possible for TrueHD tracks.

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