The audio session modes available on the device.
- iOS 9.0+
- tvOS 9.0+
- watchOS 2.0+
- Mac Catalyst 13.0+Beta
Not every audio session mode is available on every device. For example, the
video mode is unavailable on a device that doesn’t support video recording.
Query this property to determine if the mode you would like to use is available on the current device.