Indicates if the associated hardware port has built-in processing for two-way voice communication.
- iOS 10.0+
- Mac Catalyst 13.0+
- tvOS 10.0+
- watchOS 3.0+
Applications that use their own proprietary voice processing algorithms should use this property to decide when to disable processing. If your app uses Apple's Voice Processing I/O unit (subtype
k), the system will automatically manage this for you.