---
title: "init(mIOProc:mNumberStreams:mStreamIsOn:)"
framework: coreaudio
role: symbol
role_heading: Initializer
path: "coreaudio/audiohardwareioprocstreamusage/init(mioproc:mnumberstreams:mstreamison:)"
---

# init(mIOProc:mNumberStreams:mStreamIsOn:)

## Declaration

```swift
init(mIOProc: UnsafeMutableRawPointer, mNumberStreams: UInt32, mStreamIsOn: UInt32)
```