Hi Maze400
Welcome to the Roku Community!
It sounds like your Roku Ultra may be automatically detecting the maximum audio capability of your surround sound system and defaulting to that option. This can result in some content being labeled as Atmos even if it is not actually in Atmos format.
To ensure that you are getting the correct audio format, you can manually set the audio output on your Roku Ultra. Here's how:
- Go to Settings on your Roku home screen.
- Select Audio.
- Select HDMI or S/PDIF depending on how your sound system is connected to your Roku Ultra.
- Choose Manual.
Select the audio format that matches the capabilities of your surround sound system. For example, if your system supports Dolby Digital Plus, select that option.
By manually setting the audio output, you should get the correct audio format for the content you are watching. If you are still having issues, you may want to check your surround sound system settings to make sure it is configured correctly.
We hope it helps!
Warm regards,
Lianna