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# Macros

## Topics

### Preprocessor macros

[`#define AVAS_EXPORT`](/documentation/AVFAudio/AVAS_EXPORT)

[`var AVAUDIOENGINE_HAVE_AUAUDIOUNIT: Int32`](/documentation/AVFAudio/AVAUDIOENGINE_HAVE_AUAUDIOUNIT)

[`var AVAUDIOENGINE_HAVE_MUSICPLAYER: Int32`](/documentation/AVFAudio/AVAUDIOENGINE_HAVE_MUSICPLAYER)

[`var AVAUDIOFORMAT_HAVE_CMFORMATDESCRIPTION: Int32`](/documentation/AVFAudio/AVAUDIOFORMAT_HAVE_CMFORMATDESCRIPTION)

[`var AVAUDIOIONODE_HAVE_AUDIOUNIT: Int32`](/documentation/AVFAudio/AVAUDIOIONODE_HAVE_AUDIOUNIT)

[`var AVAUDIONODE_HAVE_AUAUDIOUNIT: Int32`](/documentation/AVFAudio/AVAUDIONODE_HAVE_AUAUDIOUNIT)

[`var AVAUDIOUNITCOMPONENT_HAVE_AUDIOCOMPONENT: Int32`](/documentation/AVFAudio/AVAUDIOUNITCOMPONENT_HAVE_AUDIOCOMPONENT)

[`var AVAUDIOUNIT_HAVE_AUDIOUNIT: Int32`](/documentation/AVFAudio/AVAUDIOUNIT_HAVE_AUDIOUNIT)

[`#define AVAudioApplication_h`](/documentation/AVFAudio/AVAudioApplication_h)

[`#define AVAudioUnitMIDIInstrument_MixingConformance`](/documentation/AVFAudio/AVAudioUnitMIDIInstrument_MixingConformance)

[`#define AVSpeeechSynthesisProvider_h`](/documentation/AVFAudio/AVSpeeechSynthesisProvider_h)

[`#define AudioSession_AVAudioRoutingArbiter_h`](/documentation/AVFAudio/AudioSession_AVAudioRoutingArbiter_h)

[`#define AudioSession_AVAudioSessionRoute_h`](/documentation/AVFAudio/AudioSession_AVAudioSessionRoute_h)

[`#define AudioSession_AVAudioSessionTypes_h`](/documentation/AVFAudio/AudioSession_AVAudioSessionTypes_h)

[`#define AudioSession_AVAudioSession_Deprecated_h`](/documentation/AVFAudio/AudioSession_AVAudioSession_Deprecated_h)

[`#define AudioSession_AVAudioSession_h`](/documentation/AVFAudio/AudioSession_AVAudioSession_h)


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