DTS Lip-Sync

Discussion in 'Movie Forum' started by Tim Ingman, Aug 29, 2001.

  1. Tim Ingman

    Tim Ingman
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    Anyone else have trouble with Lip-Sync on some DTS soundtracks? eg Men In Black & Hannibal - On both discs alternative Dolby Digital track is OK - Or could it be a problem with my amp ("Old" Sony 925 Receiver) or player (Tosh SD100e)?
     
  2. LV426

    LV426
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    Not likely to be in your amp. Never heard of an amp that could unintentionally add a delay.....
     
  3. Jon Weaver

    Jon Weaver
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    Atlast.. Someone else.

    I have a Samsung 709 and Sony STRDB-930 and can detect SLIGHT lip-sync on all my DTS disks.

    i.e U-571, Gladiator etc.

    I am convinced that this is a general problem, but no-one else seems to notice it.

    How bad is it.. Are we talking a fraction of a second out, or more?
     
  4. Jon Weaver

    Jon Weaver
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    LV426.

    Whilst the 'amp' can't add a noticable delay, the decoding circuit could.

    With 'normal' analogue amps, everything is don't at the speed of electricity, so delays would be un-noticable..

    But the signal to the Sony STRDB-925 is sent digitally. Then its converted into Analogue and amplified.. This conversion/decoding could easily add delay..

    Even a length of speaker wire can add a minute delay!
     
  5. Tim Ingman

    Tim Ingman
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    Delay is a fraction of a second Jon, but really IRRITATING! I use short length of speaker cable to my centre speaker (0.5 metre) & to my fronts (2 metres), but as I say, DD & Stereo soundtracks are OK and it doesn't happen on all DTS discs. eg Galaxy Quest, Apollo 13, Hell Feezes Over etc are all OK. I reckon the fault lies with the DTS track on the discs.

    Anyway. to add fuel to the fire, IMHO on a lot of new releases, there ain't a noticeable difference between the DD and DTS DD soundtracks! Has DD got better or DTS got worser?
     
  6. Jon Weaver

    Jon Weaver
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    I know exactly what you mean.. A couple of times I have started to watch something in DTS and notice minor lip-sync.. After that, it irritates me so much that I have to change to DD..

    I will have to look at my collection and see, if like you, it only applies to some titles.
     

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