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ldfan
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Post subject: Re: Slight Lip Sync Issue with Optical Audio Posted: 13 Mar 2021, 06:04 |
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Joined: 28 Jun 2014, 05:59 Posts: 1456 Location: San Francisco, CA USA Has thanked: 425 times Been thanked: 533 times
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urethrafranklin wrote: How do users of high end pass thru processors/scalers avoid these sync issues?
When it comes to all modern standalone processors, you simply run both the audio (digital and analog) and video connections to it so that it knows how much of a delay it needs to add to the audio. That's simply the key to keeping everything synced correctly. With you just running "only the video" to the DMR, you are bypassing it's ability to slow down the audio (and of course you are doing this because there is no digital audio input option on the recorder) and that's why your time sync will never match.
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ldfan
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Post subject: Re: Slight Lip Sync Issue with Optical Audio Posted: 13 Mar 2021, 07:33 |
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Joined: 28 Jun 2014, 05:59 Posts: 1456 Location: San Francisco, CA USA Has thanked: 425 times Been thanked: 533 times
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urethrafranklin wrote: Is there a list a recommended composite upscaling receivers somewhere? I'm just finding all sorts of conflicting information out there, people saying receivers aren't good enough with upscaling....
I couldn't say unless I actually played with all of them which ain't gonna happen . However, from what I have seen, a standalone processor has way more customization control over what is in an AV Receiver (my Denon just has simple rudimentary options; just a stripped down version of something found in full fledged processors). urethrafranklin wrote: ....I guess if my TV were more modern it would carry the load of upscaling better. It still depends on the TV. I think Sony's XBR series still have great 3D comb filters and video processing to get the most out the composite signal.
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signofzeta
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Post subject: Re: Slight Lip Sync Issue with Optical Audio Posted: 13 Mar 2021, 09:59 |
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Joined: 14 Jan 2010, 09:44 Posts: 5985 Location: Ann Arbor Has thanked: 1292 times Been thanked: 1105 times
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urethrafranklin wrote: For audio I was previously using the 2 analog outs: one to the receiver, one to TV to prevent sync issue. Now I've added in an optical cable (straight from the LD into the receiver) because I've hooked up surround for digital and it's all fine but I get an ever so slight sync issue when playing discs. Why are you using the digital out again? Is it for DTS? If it’s just for regular Pro Logic then just go back to using analog if that works. You don’t need the digital out to get OG surround, (although a lot of people do think that.)
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signofzeta
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Post subject: Re: Slight Lip Sync Issue with Optical Audio Posted: 13 Mar 2021, 19:38 |
Jedi Knight |
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Joined: 14 Jan 2010, 09:44 Posts: 5985 Location: Ann Arbor Has thanked: 1292 times Been thanked: 1105 times
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takeshi666 wrote: I thought the point of using the digital out was to use the receiver's DAC which might be better than the players built in one. Yes...but in how many cases is that understood by the user and in how many cases are they just using optical because it’s a newer invention than line out? If it causes delay that requires $$$ be spent fixing sync issues in his specific case then I’d say that in this specific case it’s a downgrade far more significant than quality of DAC could be.
_________________ All about LD care, inner sleeves, shrink wrap, etc.
https://youtu.be/b3O-vHpHRpM
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ldfan
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Post subject: Re: Slight Lip Sync Issue with Optical Audio Posted: 13 Mar 2021, 22:10 |
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Joined: 28 Jun 2014, 05:59 Posts: 1456 Location: San Francisco, CA USA Has thanked: 425 times Been thanked: 533 times
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I decided to do some additional research on time delay options on AV Receivers. As it turns out, I may be wrong about some or maybe all AV Receivers and their capabilities. I decided to compare my Denon, AVR-2808Ci to a Pioneer, VSX-1020-K that I had recently acquired but not set up. And what I found is that both units do appear to have an additional delay option as follows (using the Pioneer model as an example).... This first image indicates a manual override delay that is controllable up to 10 frames (up to 1/3 of a second based on 30 frames per second). However, I'm not sure if it works strictly for HDMI or a combination of analog and digital inputs but I assume it won't discriminate since it makes no mention. The Denon appears to not be as flexible in that it appears to only have the option of 0 to 200 microsecond delay (in one microsecond increments). This second image is the auto delay function which is more common on just about all HDMI equipped AV Receivers. This works strictly w/ HDMI and that makes sense since all the handshakes between the source, AV Receiver, and monitor would all agree how much delay would be needed based on how they process the video. So yes..... maybe you need to dive deeper into your Sony to see if it maybe has a manual delay as it could be buried deep in the menus. And if it turns out that is the case, you can fix your issue just like that.
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