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Sound/Video delay I've recently had problems with a sound/video delay. There seems to be a lip sync error happening on both TV and DVDs where the video is behind the sound. I've checked the speaker set-up and changed the surround mode - no luck. What causes a delay? Any advice? Thanks!

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Re: Sound/Video delay

Lip-sync error is a widespread problem caused when video is delayed and audio arrives too soon. Widespread enough that three different manufacturers make dedicated products to address it, in fact (see review link below for those three). It is present to some extent in essentially all broadcasts and DVD?s. If you have a recently acquired DLP, LCD or plasma display it may have added enough additional video delay to make it noticeable but lip-sync error comes from MANY sources starting at image capture and continuing through post production and broadcast or DVD encoding and it is cumulative. There is usually enough lip-sync error in broadcasts and DVD's to cause a negative impact on viewer perception (Research done at Stanford showed this.) Many people don't consciously notice it until it gets very large because it's such an unnatural phenomenon ( audio can't come before the action causing the sound in the real world) we apparently subconsciously avoid looking at the faces and seeing the lips move "after" the sound from them is heard. A study at Stanford proved this causes negative viewer perception even for those who don't notice it so this is something we all need to notice as you already have. For those reading this who haven't noticed it, take a close look at the LIPS - force yourself to overcome your natural avoidance mechanism that keeps you from looking at the lips - and you will see lip-sync error you never noticed before. I think you will be amazed that you could possibly not have noticed it before. You will be seeing what JC is seeing. I even see it now on CRT TV's and am amazed I never noticed it so it's very obvious some avoidance mechanism is at work. And back to JC?s solution: I'd recommend one of these digital audio delay units. That way you can correct for ALL cumulative lip-sync error no matter what its source might be. Any one of these units reviewed will correct it ALL. With any one of these units you can adjust for perfect lip-sync at the start of each DVD or broadcast and not disturb the image you are watching during that fine adjustment. I have had a Felston DD340 since 2004 (three generations earlier than the DD740 covered in the review) but it still has the most important feature of all these units from these three different manufacturers which is their "plus and minus" buttons on their remotes that allow you to tweak the delay while watching your material without upsetting the video your are watching. My av receiver has a built in delay of 80 ms which isn't even enough audio delay to offset the video delay my plasma display adds but even if it were it isn't practical to adjust it for the changes in lip-sync error from program to program and DVD to DVD since it overlays the screen with menus when making the delay adjustment. With my DD340 (and any of the units reviewed) all you have to do is press the plus or minus button until you get perfect sync. Here is the review I mentioned: [URL=""]

Posted on Sep 04, 2007

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Re: Sound/Video delay

Just a thought but my plasma takes time to process the video signal i input so it delays the audio to be released in time with the video. If you dont have the audio running into your TV and have it running to a amp then the audio will be sounded without the delay!

Just recieved a lovely DVD/AMP combo from my brother but now the audio get shot straight out the amp from my movies and the video is delayed by my plasma so im stuck... i guess i have to work out how to send all video and audio through my TV so the lag can be added the the audio

hope this helps somewhat :)

Posted on Feb 19, 2008

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I don't see a question. Are you asking about a lip-sync problem and how to correct lip-sync error? If so I need more detail to answer your question.

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Before the setup of the speakers' channels
  • Press the SURR. button on the remote to select multichannel surround mode before adjusting the speaker settings.
  • In case of sound distortion, press and hold the SOUND button to select another transmission channel for the wireless rear speakers.
Setting Speakers' Channels
  1. Press 060227073157_11231.jpg to stop playback, then press SYSTEM MENU.
  2. Press 060227073234_11234.jpg repeatedly to select { Audio Setup Page }.
  3. Press 060227073211_11232.jpg060227073221_11233.jpg to highlight { Speaker Setup Page }, then press 060227073234_11234.jpg.

  4. Enter its submenu by pressing 060227073234_11234.jpg.
  5. Press 060227073211_11232.jpg060227073221_11233.jpg to highlight one of the options below at a time, then press 060227073234_11234.jpg.

    • { Speakers Volume } – Volume level setting for individual speakers (-6dB – +6dB).

    • { Speakers Delay } – Delay times setting in relation to the listening position/ distance for centre and surround speakers.

  6. Press 060227073245_11235.jpg060227073234_11234.jpg to adjust to the setting that best suit your surround sound needs.
  7. Press OK to confirm.
  • 1 ms increase/decrease of delay time is equivalent to 30 cm change in distance. Use the longer delay time settings when the rear speakers are closer to the listener than the front speakers.
  • The test tone will automatically be generated to help you judge the sound level of each speaker.

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I have a series 6 samsung tv connected to virgin digital hd box by hdmi cable also samsung blue ray by hdmi cable if i watch a blue ray or something on virgin hd the sound is usually out of sync with my...

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Some receivers have a sound delay control which you can use to try to sync them up. You didn

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Often video signal takes more time than the audio signal to convert from analogue signal to digital signal in the Digital TV.
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