Indicates such state changes as start, stop, or seeking to another position in the timeline. Can be active if there was a change to the state of, or discontinuities in, the audio transport since the AUHostTransportStateBlock callback was last called.
Mac Catalyst 13.0+Beta
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.