Defines an opaque data type that represents an audio queue timeline object.
- iOS 2.0+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
You can use a timeline object to observe time discontinuities in the audio hardware device associated with an audio queue. A discontinuity is, for example, a period of silence when sound was expected. Causes of discontinuities include changes in device state or data processing overloads. See Technical Q&A 1467, CoreAudio Overload Warnings. You query a timeline object by passing it as a parameter to the