tvOS 18.0
Add Voice Isolation as an Enhance Dialogue option on Apple TV
You can turn on Add Voice Isolation as an option to the Enhance Dialogue feature on Apple TV. When Isolate is activated from audio playback controls, dialogue is completely isolated and other elements of the audio mix are substantially reduced for people who need maximum clarity.
Go to Settings on Apple TV.
Go to Accessibility, then select Add Voice Isolation to turn it on.