Hi @kafikar1,
Greetings from the Roku Community!
We'll gladly assist you further with your Roku Select Series TV audio concern. Please check out this support article here on changing sound settings on your Roku audio device.
I hope I have addressed your question appropriately. If the above does not fix your issue, reply to this message, and we will gladly follow up.
Best,
The Roku Community Team
John
Roku Community Moderator