The bandwidth value that causes a switch, up or down, in the item's quality being played.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The value of the property is negative if unknown.
Corresponds to “c-switch-bitrate”.
This property is not compatible with Key-value observing.