Instance Property


An array containing the audio unit’s output connection points.


iOS, Mac Catalyst, tvOS
@property(readonly, nonatomic) AUAudioUnitBusArray *outputBusses;
@property(readonly, atomic) AUAudioUnitBusArray *outputBusses;


Subclasses must override this property’s getter. The audio unit should return the same object every time it is asked for it, since hosts can install KVO observers on it.

See Also

Querying Busses


An array containing the audio unit’s input connection points.

Beta Software

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.

Learn more about using Apple's beta software