---
title: AVAudioFileTypeKey
framework: avfaudio
role: symbol
role_heading: Global Variable
path: avfaudio/avaudiofiletypekey
---

# AVAudioFileTypeKey

A string that indicates the audio file type.

## Declaration

```swift
let AVAudioFileTypeKey: String
```

## See Also

### Getting Audio File Properties

- [url](avfaudio/avaudiofile/url.md)
- [fileFormat](avfaudio/avaudiofile/fileformat.md)
- [processingFormat](avfaudio/avaudiofile/processingformat.md)
- [length](avfaudio/avaudiofile/length.md)
- [AVAudioFramePosition](avfaudio/avaudioframeposition.md)
- [framePosition](avfaudio/avaudiofile/frameposition.md)
- [AVAudioFrameCount](avfaudio/avaudioframecount.md)
- [isOpen](avfaudio/avaudiofile/isopen.md)