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DTS Sound from BluRay Player causes Audio Delay

post #1 of 7
2/9/09 at 9:53pm
Thread Starter 
Hello everyone,

I'd really appreciate your thoughts on this. I have a Sony BDP-S350 connected to a 50" plasma via HDMI. The audio is being sent to a 5.1 surround receiver via optical cable. For some reason whenever I use DTS sound, the audio is delayed about half a second.

I've tried 2 different optical cables and a digital coax but no improvement.

Both the Blu-ray player and the receiver have AV sync that allows delaying the audio MORE, but I can't move the audio earlier.

Not really sure what to think, the receiver supports DTS. Anyone have a possible solution or theory on what's causing the problem?

Thanks,

Brian
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post #2 of 7
2/19/09 at 1:50pm
Thread Starter 
.
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post #3 of 7
2/19/09 at 8:36pm
Sorry - I don't have answers for you, but your post gives me questions.
Quote:
Originally Posted by marauder09 View Post

I have a Sony BDP-S350 . . . The audio is being sent to a 5.1 surround receiver via optical cable.

Given that you have a BD player with the possibility of lossless audio, why do you use an optical connection?
Quote:


For some reason whenever I use DTS sound, the audio is delayed about half a second.

A half second is HUGE. If you really mean that, then something is really wrong. In fact, it's hard to believe that it's delayed that much. Could it be some kind of echo effect that is applied by your receiver? But you seem to imply that it only happens with DTS - is DD all fine?
Quote:


Both the Blu-ray player and the receiver have AV sync that allows delaying the audio MORE, but I can't move the audio earlier.

Why are you bringing up moving the audio earlier when you say that the audio is delayed?

Where are you decoding - in the player or the receiver?

Ed
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post #4 of 7
2/26/09 at 1:53pm
Thread Starter 
Hi ekb, thanks for replying,

Quote:


Given that you have a BD player with the possibility of lossless audio, why do you use an optical connection?

I was under the impression that optical cables provided good audio quality, what cable would you suggest? I've also read about digital coax but it didn't seem superior to optical.

Quote:


A half second is HUGE. If you really mean that, then something is really wrong. In fact, it's hard to believe that it's delayed that much. Could it be some kind of echo effect that is applied by your receiver? But you seem to imply that it only happens with DTS - is DD all fine?

I don't hear any echo, just delay. And yes, from the BDs I've tested Dolby Digital surround and stereo work fine, I only get the audio delay with DTS.

Quote:


Why are you bringing up moving the audio earlier when you say that the audio is delayed?

I want to move the audio earlier because it is delayed, using the AV sync only allows delaying the audio more (since typically it's the video that is delayed, not audio).

Quote:


Where are you decoding - in the player or the receiver?

I don't know the answer to this question. Does this have to do with how the receiver is connected to the BluRay player or is it something in the settings?

Also the receiver is an LG LH-E9674
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post #5 of 7
2/26/09 at 2:24pm
Try running an HDMI from the Sony to the LG, and another HDMI from the LG to the TV.
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post #6 of 7
2/26/09 at 3:04pm
Thread Starter 
Quote:
Originally Posted by Ratman View Post

Try running an HDMI from the Sony to the LG, and another HDMI from the LG to the TV.

The receiver only has 1 HDMI...argh
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post #7 of 7
2/26/09 at 8:30pm
Quote:
Originally Posted by marauder09 View Post

I was under the impression that optical cables provided good audio quality, what cable would you suggest? I've also read about digital coax but it didn't seem superior to optical.

Yes, optical and coax are really the same quality and both good - it's just that they can't carry the best quality lossless signal. You'd need either HDMI to carry a lossless digital signal or analog cables. I didn't realize that you're using a HTIB with limited connections. I think you have neither an HDMI input nor multi-channel analog input.
Quote:


I don't hear any echo, just delay. And yes, from the BDs I've tested Dolby Digital surround and stereo work fine, I only get the audio delay with DTS.

As I said above, I didn't realize this is a HTIB. It may be that DTS decoding is just too much for the LG unit - although that's hard to believe.

Ed
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