I'd like to start here a small discussion about the slight audio sync issues when playing media with framerates around 24Hz respectivey 23.976Hz on wrxtasys builds (I guess all other builds behave the same, so not just wrxtasys)
At first: Please don't get me wrong here... the sync issue (if appearing at all on your setup) is easily correctable for the entire library during kodi playback in OSD menu, once you've found the offset. But let me still throw my thoughts into this thread, please.
Here and there some (me as well) mentioned this issue at forum.odroid.com. I for example thought at first it was something varying between -50ms and +50ms, but since I startet watching movies more often the last weeks I gave it a closer look. On my Philips TV it is steadily about -150ms for all 24Hz content. And this offset is not occuring with LiveTV 50Hz or 60Hz, so I'm quite sure it is because of image processing done in my tv whenever it switches into bluray playback mode with 1080p24 (
24Hz). This mode is always triggering whenever bluray content is played.
Well...that being said, it means that these -150ms are TV-device specific and every TV has it's own delay because of image processing. And as I connect the Odroid C2 to my AVR (which in turn is connected to my TV via HDMI out) the delay should be correct by the AVR automatically, because there is this
LipSync feature in HDMI standard - that means the TV tells the AVR the offset with a handshake.
I see how my Raspberry is handling it perfectly without any sync issues and I wonder what the reason might be that the C2 apparently does have trouble with that. Well, at first I thought this topic belongs in odroid forum, but when I saw how
noggin exploded with his HDR knowledge, I then thought that here might be more specialists, who perhaps know how "
Lipsync" works or who could perhaps find other explanations for sync problems. In my opinion it could likely be "LipSync" related.
Here's somebody writing about changes in LipSync standard introduced with HDMI 2.0:
http://www.avsforum.com/forum/90-receive...st36972730
Perhaps somebody feels addressed by this and can share his thoughts about it?