---
title: "init(_:byteSize:)"
framework: coremidi
role: symbol
role_heading: Initializer
path: "coremidi/unsafemutablemidipacketlistpointer/init(_:bytesize:)-96k5n"
---

# init(_:byteSize:)

## Declaration

```swift
init?(_ p: UnsafeMutablePointer<MIDIPacketList>?, byteSize: Int)
```