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# AudioFileTypeID

Operating system constants that indicate the type of file to be written or a hint about what type of file to expect from data provided.

```
typealias AudioFileTypeID = UInt32
```

## Topics

### Constants

[`kAudioFileAIFFType`](/documentation/AudioToolbox/kAudioFileAIFFType)

An Audio Interchange File Format (AIFF) file.

[`kAudioFileAIFCType`](/documentation/AudioToolbox/kAudioFileAIFCType)

An Audio Interchange File Format Compressed (AIFF-C) file.

[`kAudioFileWAVEType`](/documentation/AudioToolbox/kAudioFileWAVEType)

A Microsoft WAVE file.

[`kAudioFileSoundDesigner2Type`](/documentation/AudioToolbox/kAudioFileSoundDesigner2Type)

A Sound Designer II file.

[`kAudioFileNextType`](/documentation/AudioToolbox/kAudioFileNextType)

A NeXT or Sun Microsystems file.

[`kAudioFileMP3Type`](/documentation/AudioToolbox/kAudioFileMP3Type)

An MPEG Audio Layer 3 (`.mp3`) file.

[`kAudioFileMP2Type`](/documentation/AudioToolbox/kAudioFileMP2Type)

An MPEG Audio Layer 2 (`.mp2`) file.

[`kAudioFileMP1Type`](/documentation/AudioToolbox/kAudioFileMP1Type)

An MPEG Audio Layer 1 (`.mp1`) file.

[`kAudioFileAC3Type`](/documentation/AudioToolbox/kAudioFileAC3Type)

An AC-3 file.

[`kAudioFileAAC_ADTSType`](/documentation/AudioToolbox/kAudioFileAAC_ADTSType)

An Advanced Audio Coding (AAC) Audio Data Transport Stream (ADTS) file.

[`kAudioFileMPEG4Type`](/documentation/AudioToolbox/kAudioFileMPEG4Type)

An MPEG 4 file.

[`kAudioFileM4AType`](/documentation/AudioToolbox/kAudioFileM4AType)

An M4A file.

[`kAudioFileCAFType`](/documentation/AudioToolbox/kAudioFileCAFType)

A Core Audio File Format file.

[`kAudioFile3GPType`](/documentation/AudioToolbox/kAudioFile3GPType)

A 3GPP file, suitable for video content on GSM mobile phones.

[`kAudioFile3GP2Type`](/documentation/AudioToolbox/kAudioFile3GP2Type)

A 3GPP2 file, suitable for video content on CDMA mobile phones.

[`kAudioFileAMRType`](/documentation/AudioToolbox/kAudioFileAMRType)

An AMR (Adaptive Multi-Rate) file suitable for compressed speech.


---

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