Audio/Video Not Sync'd on MKV with Digital sound but OK with stereo

Hi,

     I have noticed that when I play mkv files with sound set to digital on WD Live player, the sound and video are not synched.

I have an optical cable from live to a surround amp.

However if I switch to stereo on the WD live, whether through optical or HDMI /stereo connection to amp, then the sound is in synch.

We are working on these kinds of issues, but have you checked the other threads to see if you can get some more help on this?