---
title: mAudioDataBytesCapacity
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/audioqueuebuffer/maudiodatabytescapacity
---

# mAudioDataBytesCapacity

The size of the audio queue buffer, in bytes. This size is set when a buffer is allocated and cannot be changed.

## Declaration

```swift
var mAudioDataBytesCapacity: UInt32 { get }
```