Chrome Version       : 67.0.3396.99
OS Version: 10575.58.0
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari:
    Firefox:
    IE/Edge:

What steps will reproduce the problem?
1. Connect the HDMI cable to a media centre.
2. Play a video with 5.1 sound
3.

What is the expected result?
5.1 audio with the video.

What happens instead of that?
All channels get redirected to front left and right channels.

Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (X11; CrOS aarch64 10575.58.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36