The time value, in seconds, of the audio output device.
- iOS 4.0+
- macOS 10.7+
- tvOS 9.0+
- watchOS 2.0+
The value of this property increases monotonically while an audio player is playing or paused.
If more than one audio player is connected to the audio output device, device time continues incrementing as long as at least one of the players is playing or paused.
If the audio output device has no connected audio players that are either playing or paused, device time reverts to 0.
Use this property to indicate “now” when calling the
play(at instance method. By configuring multiple audio players to play at a specified offset from
device, you can perform precise synchronization—as described in the discussion for that method.