sound through hdmi stopped working

[dajaga]

ok i got a problem the sound through my hdmi has stopped working, it was good last night, i have the gigabyte ga-ma78gm-s2h any tips will be good.
fyi its not my amp its the computer.
and i got ac3filter, coreavc codec, mediaportal and vlc. i thnk thats all i got for codecs./video players

 

[vsboxerboy]

you're sure you have the default audio playback device set correctly? does it work with non encoded media?