---
title: IOAudioEngineNotifications
framework: kernel
role: symbol
role_heading: Type Alias
path: kernel/ioaudioenginenotifications
---

# IOAudioEngineNotifications

## Declaration

```occ
typedef enum _IOAudioEngineNotifications IOAudioEngineNotifications;
```

## Topics

### Constants

- [kIOAudioEngineAllNotifications](kernel/ioaudioenginenotifications/kioaudioengineallnotifications.md)
- [kIOAudioEngineChangeNotification](kernel/ioaudioenginenotifications/kioaudioenginechangenotification.md)
- [kIOAudioEnginePausedNotification](kernel/ioaudioenginenotifications/kioaudioenginepausednotification.md)
- [kIOAudioEngineResumedNotification](kernel/ioaudioenginenotifications/kioaudioengineresumednotification.md)
- [kIOAudioEngineStartedNotification](kernel/ioaudioenginenotifications/kioaudioenginestartednotification.md)
- [kIOAudioEngineStoppedNotification](kernel/ioaudioenginenotifications/kioaudioenginestoppednotification.md)
- [kIOAudioEngineStreamFormatChangeNotification](kernel/ioaudioenginenotifications/kioaudioenginestreamformatchangenotification.md)

## See Also

### Audio Data

- [IOAudioEngineTraps](kernel/ioaudioenginetraps.md)
- [IOAudioSampleRate](kernel/ioaudiosamplerate.md)
- [IOAudioStreamFormat](kernel/ioaudiostreamformat.md)
- [IOAudioStreamFormatExtension](kernel/ioaudiostreamformatextension.md)
- [IOAudioTimeStamp](kernel/ioaudiotimestamp.md)
- [IOAudioClientBuffer](kernel/ioaudioclientbuffer.md)
- [IOAudioClientBuffer64](kernel/ioaudioclientbuffer64.md)
- [IOAudioClientBufferExtendedInfo](kernel/ioaudioclientbufferextendedinfo.md)
- [IOAudioClientBufferExtendedInfo64](kernel/ioaudioclientbufferextendedinfo64.md)
- [IOAudioEnginePosition](kernel/ioaudioengineposition.md)
- [IOAF_bcopy_WriteCombine](kernel/1416189-ioaf_bcopy_writecombine.md)
- [UInt64mult](kernel/1402722-uint64mult.md)