Audio is an issue at the moment but we are looking into it. Audio does work fine however with an external USB sound card so it's likely something to do with RK's HDMI handling.
Firmware updates for existing LE device owners will be available soon.
Big respect to MAC_L1 for his hard work.. don't forget to show your support

http://freaktab.com/forum/tv-player-support/rk3288-devices/512974-xbmc-kodi-on-linux-rk3288