sky tv puck , sound issue , sound doesn’t line up with video , when turned off it goes back to norm

[hmw2468]

sound on all tv channels and apps becomes out of sinc with the video after around 30 mins / 1 hour, when box is turned of an back on sound and video are back in sinc but again they will be out of time , this issue has been going on for around 4 weeks now , i have sky broadband aswell and when audio visual does not work the broadband still works perfectly 

[Fothergill1]

@hmw2468  Welcome to the forum.

The lip sync issue is a known problem that Sky are trying to fix.  They recommend changing your Audio to PCM or Passthrough as a temporary workaround whilst they find a permanent solution.

You can change the audio setting at Settings > Picture & Sound > Sound > Digital Audio Output HDMI.