---
title: "SpeakBuffer(_:_:_:_:)"
framework: Application Services
role: symbol
role_heading: Function
platforms: [Mac Catalyst 16.0+, xcode 14.0+]
path: applicationservices/4030021-speakbuffer
---

# SpeakBuffer(_:_:_:_:)

## Declaration

```swift
func SpeakBuffer(_ chan: SpeechChannel, _ textBuf: UnsafeRawPointer, _ textBytes: UInt, _ controlFlags: Int32) -> OSErr
```