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Originally Posted by
BIslander /t/1522353/tv-sound-settings-pcm-vs-surround#post_24479965
You may want to check again.
Most Smart TVs output multichannel from their own apps. And, increasingly, TVs will send DD 5.1 from HDMI and USB inputs. Some even do DTS.
Sure. Thanks for the info. The last time I checked was about five years ago when I bought my last TV. Which is why I recommended that the OP refer to his TV manual and audio equipment. You know, the next paragraph. The part that you didn't quote
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No. There's no compression associated with S/PDIF connections. PCM is limited to stereo. But, it's not compressed.
I see a little confusion which might have been avoided had my explanation been a little more thorough, but, "yes", there is compression associated with s/pdif where Dolby and multi-channel soundtracks are concerned.
You had brought up PCM audio quality when discussing Dolby/PCM options, and reduction of 5.1 surround to two-channel PCM. There's no argument from me that the optical cable will deliver an uncompressed two channel signal. However, if you take compressed 5.1 Dolby and convert it PCM, then you ultimately have a lossy PCM soundtrack. Even Dolby two channel and mono sources are likely to be compressed. Thus, I tend to disagree with your opinion that "in terms of quality, PCM is as good as it gets."
Two channel sources such as music CD's, wav and flac files will play without compression. However, the TV's Dolby setting won't alter playback, so that becomes a moot point.
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The OP here needs to see if he can fix the sync issue when he sets the TV output to DD. if not, then he needs to see if a direct audio connection to the AVR from a device like the Xbox will give him multichannel audio that's in sync with the picture.
Okay then! I've got a little time to kill. With all of these new TV improvements, I might as well check and see if the Samsung F6400 has a feature to correct audio delay issues.
USER MANUAL PDF
The first thing I notice on page 91 is the 'SPEAKER SETTINGS' feature. I would probably choose the 'EXTERNAL' setting, which turns off the TV's speakers and eliminates echoey type phase issues.
But more importantly; go to page 93 and you'll find a solution for audio synching. Verbatim:
"–– Audio Delay --
Lets you correct timing mismatches between the audio track and the video when you are watching the TV and listening to digital audio output from the TV through an external device such as an AV receiver. When you select the Audio Delay function, a slider screen appears. Adjust the option value using your remote control (0ms ~ 250ms)"
Another possible source of audio synch lies with media content providers, such as Netflix. Occasionally a problem exists with the material, not the playback hardware. KarolisD, if you haven't already fixed the problem, Good Luck. That is a very nice TV you have. Hope you're enjoying it.