An array of input ports available for routing.
- iOS 7.0+
- tvOS 9.0+
- watchOS 2.0+
An array of
AVAudio objects representing audio input devices currently attached to the system and relevant to the audio session’s current category and mode. For example, if the session’s category is
play, the array could contain a built-in microphone and (if plugged in) a headset microphone port.