The audio player’s playback rate.
- iOS 5.0+
- macOS 10.8+
- tvOS 9.0+
- watchOS 2.0+
This property’s default value of
1 provides normal playback rate. The available range is from
0 for half-speed playback through
2 for double-speed playback.
To set an audio player’s playback rate, you must first enable rate adjustment as described in the
enable property description.