A mode that indicates that your app plays audio using text-to-speech.
- iOS 12.0+
- Mac Catalyst 13.0+
- tvOS 12.0+
- watchOS 5.0+
Setting this mode allows for different routing behaviors when your app is connected to certain audio devices, such as CarPlay. An example of an app that uses this mode is a turn-by-turn navigation app that plays short prompts to the user.