---
title: mPacketDescriptionCount
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/audioqueuebuffer/mpacketdescriptioncount
---

# mPacketDescriptionCount

The number of valid packet descriptions in the buffer. You set this value when providing buffers for playback. The audio queue sets this value when returning buffers from a recording queue.

## Declaration

```swift
var mPacketDescriptionCount: UInt32
```