Way does the sound not roku. It woks on all thothers

I'm not sure you can with roku

Night Listening Feature
Night listening feature is one of the Roku audio features. This feature allows the user to watch the media without disturbing other. By this feature, the loud sounds are decreased as explosions and soft sounds are increased as whispering. In HDMI connection only the night listening feature can be enabled.
Night listening feature is available onRoku Premiere & Roku Premiere+.
Steps to Enable the Night listening features:
·From the home screen, Settings?Audio?Night listening mode


·You can change the feature by turn on and off option.
When you are watching programs on your Roku, suddenly you want to enable the Roku night listening feature; you can enable it by pressing the asterisk button on your Roku. By pressing it the pop-up panel will be displayed on the left of the screen.
If you want further more details about the Roku features call +1-844-965-4357 and visit https://www.rokuactivationcode.com/tips-and-tricks-for-using-roku-hidden-features

Sounds like the heating element has burned out.

That is normal for an open centre diff that has no load on the opposite axel.

If the picture is OK then check your sound cables, red and white if analog, or swap out the HDMI cable with one that you know works.
Also, on the SETTINGS screen make sure your audio is set to stereo not surround sound.

What to do if you do not hear the audio from your Roku

Audio Not Audible on Roku Device? Follow the steps
Sometimes this problem arrives on a Roku device and the user is not able to hear anything while playing a video. This occurs due to the wrong system configuration or device being set on a low volume option or mute.

Solution:
1. Try increasing the volume of your Roku streaming device and TV.
2. If this does not solve the issue
3. Then Go to 'Settings > Audio' and try switching between Dolby Digital and Dolby Digital/DD+ modes.
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Out of the blue, my ROKU had sound but no picture.

To correct, I unplugged the Roku for 5 minutes. I restarted the Roku and the problem was corrected.

https://support.roku.com/category/115001360548--troubleshooting