---
title: kExtAudioFileProperty_ClientDataFormat
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kextaudiofileproperty_clientdataformat
---

# kExtAudioFileProperty_ClientDataFormat

The audio stream format for your application.

## Declaration

```swift
var kExtAudioFileProperty_ClientDataFormat: ExtAudioFilePropertyID { get }
```

## Discussion

Discussion The audio stream format for your application. Value is a read/write AudioStreamBasicDescription struct. Discussion The format must be linear PCM (specified by the kAudioFormatLinearPCM constant from the CoreAudioTypes.h header file). You must set this property to allow encoding or decoding of a non-PCM file data format. You can set this property on PCM files to specify the data format to use in your read and write calls.

## See Also

### Constants

- [kExtAudioFileProperty_FileDataFormat](audiotoolbox/kextaudiofileproperty_filedataformat.md)
- [kExtAudioFileProperty_FileChannelLayout](audiotoolbox/kextaudiofileproperty_filechannellayout.md)
- [kExtAudioFileProperty_ClientChannelLayout](audiotoolbox/kextaudiofileproperty_clientchannellayout.md)
- [kExtAudioFileProperty_CodecManufacturer](audiotoolbox/kextaudiofileproperty_codecmanufacturer.md)
- [kExtAudioFileProperty_AudioConverter](audiotoolbox/kextaudiofileproperty_audioconverter.md)
- [kExtAudioFileProperty_AudioFile](audiotoolbox/kextaudiofileproperty_audiofile.md)
- [kExtAudioFileProperty_FileMaxPacketSize](audiotoolbox/kextaudiofileproperty_filemaxpacketsize.md)
- [kExtAudioFileProperty_ClientMaxPacketSize](audiotoolbox/kextaudiofileproperty_clientmaxpacketsize.md)
- [kExtAudioFileProperty_FileLengthFrames](audiotoolbox/kextaudiofileproperty_filelengthframes.md)
- [kExtAudioFileProperty_ConverterConfig](audiotoolbox/kextaudiofileproperty_converterconfig.md)
- [kExtAudioFileProperty_IOBufferSizeBytes](audiotoolbox/kextaudiofileproperty_iobuffersizebytes.md)
- [kExtAudioFileProperty_IOBuffer](audiotoolbox/kextaudiofileproperty_iobuffer.md)
- [kExtAudioFileProperty_PacketTable](audiotoolbox/kextaudiofileproperty_packettable.md)