Solved! NETFLIX Sound Optical

[lemalp2]

Netflix playing movie preview with sound but as soon as I press play sound disappear? I connect the TV via an optical cable, some movies do play sound but most don't?

 

[kanewolf]

What is on the other end of the optical cable? Can that device decode surround sound?

 

[americanaudiophile]

Since some movies have sound and others don't check if there are any audio settings in the Netflix app or the device you use to stream.