---
title: streamDescription
framework: avfaudio
role: symbol
role_heading: Instance Property
path: avfaudio/avaudioformat/streamdescription
---

# streamDescription

The audio format properties of a stream of audio data.

## Declaration

```swift
var streamDescription: UnsafePointer<AudioStreamBasicDescription> { get }
```

## Discussion

Discussion Returns an AudioStreamBasicDescription that you use with lower-level audio APIs.