Begins playing or recording audio.
- iOS 2.0+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
The audio queue to start.
The time at which the audio queue should start.
To specify a start time relative to the timeline of the associated audio device, use the
mfield of the
NULLto indicate that the audio queue should start as soon as possible.
A result code. See Result Codes.
If the associated audio device is not already running, this function starts it.