---
title: "init(mCommand:mCommandLength:mResponse:mResponseLength:mResponseUsed:)"
framework: Core Media I/O
role: symbol
role_heading: Initializer
platforms: [Mac Catalyst 13.1+, macOS 10.7+]
path: "coremediaio/cmiodeviceavccommand/init(mcommand:mcommandlength:mresponse:mresponselength:mresponseused:)"
---

# init(mCommand:mCommandLength:mResponse:mResponseLength:mResponseUsed:)

## Declaration

```swift
init(mCommand: UnsafeMutablePointer<UInt8>!, mCommandLength: UInt32, mResponse: UnsafeMutablePointer<UInt8>!, mResponseLength: UInt32, mResponseUsed: UInt32)
```