---
title: performFormatChange
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioaudioengine/3516524-performformatchange
---

# performFormatChange

## Declaration

```occ
virtual IOReturn performFormatChange(IOAudioStream *audioStream, const IOAudioStreamFormat *newFormat, const IOAudioSampleRate *newSampleRate);
```