I’m having a lot of lip-sync issues with the LG C9 connected to my Sony soundbar (HT-X9000F) when using HDMI ARC. I have eARC ‘On’ in both the C9 and Sony soundbar settings.
The soundbar goes straight from HDMI ARC to Input 2 on the C9 (ARC). With Xbox connected straight into the TV, there is noticeable lip-sync problems when using any of the apps (games, youtube, Netflix, HBO Go etc.) Xbox audio is set to Bitstream.
I am very surprised by this since eARC is supposed to completely eliminate any lip-sync issues. The only way to eliminate the lip-sync issues is to run the Xbox thru the soundbar instead of straight into the C9, but then I lose ALLM and VRR capability. Apparently the soundbar can’t pass those features through it.
Another weird thing...with the C9’s built-in Netflix and youtube apps, I get a perfect sync with Netflix, but there is an A/V sync problem with youtube. Again, this is while using the ARC connections between the Sony soundbar and C9 with eARC enabled on both. Is anybody else having this problem? Isn’t eARC supposed to enable a perfect A/V sync?
LG C9 65”
Sony X9000F soundbar
Xbox One S, PS4
Last edited by steelstring41; 05-19-2019 at 01:34 PM.