---
title: IOAudioStreamFormatExtension
framework: kernel
role: symbol
role_heading: Type Alias
path: kernel/ioaudiostreamformatextension
---

# IOAudioStreamFormatExtension

## Declaration

```occ
typedef struct _IOAudioStreamFormatExtension IOAudioStreamFormatExtension;
```

## Topics

### Instance Properties

- [fBytesPerPacket](kernel/ioaudiostreamformatextension/1491104-fbytesperpacket.md)
- [fFlags](kernel/ioaudiostreamformatextension/1491206-fflags.md)
- [fFramesPerPacket](kernel/ioaudiostreamformatextension/1490784-fframesperpacket.md)
- [fVersion](kernel/ioaudiostreamformatextension/1490858-fversion.md)

## See Also

### Audio Data

- [IOAudioEngineNotifications](kernel/ioaudioenginenotifications.md)
- [IOAudioEngineTraps](kernel/ioaudioenginetraps.md)
- [IOAudioSampleRate](kernel/ioaudiosamplerate.md)
- [IOAudioStreamFormat](kernel/ioaudiostreamformat.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)