---
title: mMagicCookieSize
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/audioformatinfo/mmagiccookiesize
---

# mMagicCookieSize

The size, in bytes, of the mMagicCookie parameter.

## Declaration

```swift
var mMagicCookieSize: UInt32
```