---
title: "init(mASBD:mMagicCookie:mMagicCookieSize:)"
framework: audiotoolbox
role: symbol
role_heading: Initializer
path: "audiotoolbox/audioformatinfo/init(masbd:mmagiccookie:mmagiccookiesize:)"
---

# init(mASBD:mMagicCookie:mMagicCookieSize:)

## Declaration

```swift
init(mASBD: AudioStreamBasicDescription, mMagicCookie: UnsafeRawPointer, mMagicCookieSize: UInt32)
```