extern NSNotificationName _Nonnull AVSpeechSynthesisAvailableVoicesDidChangeNotification
AVSpeechSynthesisVoice
@property(nonatomic, readonly) AVSpeechSynthesisVoiceTraits voiceTraits;
AVSpeechSynthesizer
@property(class, nonatomic, readonly) AVSpeechSynthesisPersonalVoiceAuthorizationStatus personalVoiceAuthorizationStatus;
RoutingConfiguration
@property(atomic, readonly) BOOL prefersInterruptionOnRouteDisconnect;
extern const AVAudioSessionPort AVAudioSessionPortContinuityMicrophone
extern NS_SWIFT_NAME(AVAudioApplication.inputMuteStateChangeNotification) const NSNotificationName AVAudioApplicationInputMuteStateChangeNotification
extern NS_SWIFT_NAME(AVAudioApplication.muteStateKey) NSString *const AVAudioApplicationMuteStateKey
AVAudioInputNode
@property(nonatomic, assign, unsafe_unretained, readwrite) AVAudioVoiceProcessingOtherAudioDuckingConfiguration voiceProcessingOtherAudioDuckingConfiguration;