---
title: formatDescription
framework: avfaudio
role: symbol
role_heading: Instance Property
path: avfaudio/avaudioformat/formatdescription
---

# formatDescription

The audio format description to use with Core Media APIs.

## Declaration

```swift
var formatDescription: CMAudioFormatDescription { get }
```

## See Also

### Getting Audio Format Values

- [sampleRate](avfaudio/avaudioformat/samplerate.md)
- [channelCount](avfaudio/avaudioformat/channelcount.md)
- [channelLayout](avfaudio/avaudioformat/channellayout.md)