@YanSSS
Thanks for the inquiry.
Please be aware that Audio mode allows for a selection of audio settings when trying to play a movie or TV show in surround sound, then it is possible that your TV, AVR, or soundbar does not support the surround sound format used by the content provider.
For more information about using Audio mode, visit our Support page here: What should I do if I do not hear the audio from my Roku® streaming player?
Thanks,
Danny
Danny R.
Roku Forum Moderator