I ran into this thread because of audio sync issues. I followed the advice mentioned here but my first remark is that -250 makes it worse. I then moved the slider to the opposite side (250) and things are better although not perfectly synchronized. Various video files are fine and played well by all other media players on the same device and kodi's on other devices. I also have this issue both with the optimized xbmc but also kodi 14.2 This a big turn off. My MK809II 1/3 of the price plays better the videos over wifi than this device over ethernet. Is there a good way to solve this good or is it always a hack with audio delays etc which are not that precise?