Lip Sync issue 100% identified. LG OLED owners take note!! My quest has ended. I have 100% identified the cause of lip sync issues with the Oppo 203 / Dolby Vision... although Oppo and LG should share the blame. There isn't a permanent solution to this when playing different sources, but I do know what is causing it.. Its the LG OLED's 'Real Cinema' option in the picture menu. The trick is that the option is greyed out (not applicable) with anything except 24p content, so you can't always reach in to turn it on/off. But if its ON (and you must check with each type of source content based on its frames per second...it doesn't 'stick'), then you will get a 126ms picture delay with 24p content. I guarantee it. The annoying thing is that you can't turn it on with SD content, so the only way to get consistent lip sync is to turn it OFF for everything. However, there is a caveat... if you play a Dolby Vision disc, Real Cinema on the TV get's turned on automatically and you can't turn it off!! This must be a Dolby Vision requirement. Sadly, the audio delay setting on the Oppo does nothing with DV discs, so you can't correct for it on the player. Also, you can't access your AV Amp's audio delay setting while a DV disc is playing (again, must be a DV requirement), so you can't correct it there either!!! However, as long as you add around 126ms of audio delay on your AV Amp BEFORE you play the DV disc, you will get perfect sync. The only issue then is you have to return the audio delay in the amp back to 0 for non DV content (assuming you have turned Real Cinema OFF on the TV). Anyone who owns an LG OLED and the Oppo 203 needs to see this. I'm 100% certain this is the cause of all the problems. I've been doing hours of testing. Basically, you need 2 different audio delay settings for different circumstances... but at least now you know what those circumstances are. Oppo should: - activate the player's audio delay function with DV discs. - provide a 'per content' memory setting for audio delay. LG should: - allow real cinema to be engaged / disengaged at any time, or massivley reduce the picture processing time when its engaged. Honestly this has been killing me for months, and I suspect anyone on these forums who's been saying they get perfect sync 100% of the time with this screen/player combination will fall into 2 camps... 1) They have Real Cinema turned off for everything. AND 2) They don't have any DV content on disc. For everyone else, I suspect like me you've been tearing your hair out. Please can other Oppo203 / LG OLED owners test this for themselves and confirm I'm not making it up.