Hi @ach87,
Thanks for posting here in Roku Community.
If you wish to set up a non-Roku surround sound system for your Roku TV, we recommend you visit our support page. This article provides more details about each surround sound connection and explains how you can get the best performance with your Roku TV: Connect surround sound to your Roku TV
With Roku audio devices, you can easily add surround sound without the hassle of wires and the complicated setup typical of most surround sound systems. This article provides more details about each Roku audio device, describes what you need to get started, and helps you achieve a successful setup: How to set up a Roku surround sound system
Hope this help. Please let us know if there is anything else we can assist you with.
Regards,
Nimfa