Hi Theman2100,
A warm welcome here at the Roku Community!
We appreciate you reaching out to us regarding your Roku surround sound issues, and we're happy to provide assistance.
You can configure various surround sound settings on your Onn TV using your ONN Roku remote in the S/PDIF and ARC menus using the instructions below.
- Press Home on your Roku TV remote.
- Scroll and select Settings.
- Select System
- Select Audio
- Select S/PDIF and ARC, make a selection, and choose "Auto Detect.", This is the default setting that allows your Roku TV to automatically detect the capabilities of your surround sound system over the HDMI connection.
For further information on setting up surround sound with a Roku TV, check out this link: How to connect a surround sound system to your Roku TV
Let us know how it goes.
Warm regards,
Janadee