I have the same issues as alessalvo audio lag when playing MKV files using Kodi. 0.4 sec delay. Easily adjusted within Kodi. I found with libstagefright switched of video playback was much improved, but audio sync problem still present. Happy that Kodi plays my 3d MKV files but i did have an issue playing one file which is split into two sections. Kodi recognises that the two halves are the same movie and plays them consecutively but when it starts to play the second half the audio goes further and further out of sync. All in all happy with the product and i am sure that things will improve with updates in the future.
