Click the Run button next to the Audio troubleshooting option. Follow the on-screen instructions to let the troubleshooter detect and fix issues with your computer's audio settings.

To access and use the new Video Troubleshooter for Video Playback in the Get Help app of Windows 11, follow the steps in this post.

If Spatial Sound settings keep changing and reverting to Windows Sonic after every restart, here are some working solutions to help you.