---
title: AudioUnitRenderContext
framework: audiotoolbox
role: symbol
role_heading: Structure
path: audiotoolbox/audiounitrendercontext
---

# AudioUnitRenderContext

A structure that contains thread context information for a real-time rendering operation.

## Declaration

```occ
struct AudioUnitRenderContext;
```

## Mentioned in

Adding Audio Unit Auxiliary Real-Time Threads to Audio Workgroups

## Overview

Overview When the thread context of a rendering operation changes, the system packages the new rendering context information in an AudioUnitRenderContext structure and passes it to the AURenderContextObserver block of any associated Audio Unit app extensions.

## Topics

### Properties

- [workgroup](audiotoolbox/audiounitrendercontext/workgroup.md)
- [reserved](audiotoolbox/audiounitrendercontext/reserved.md)

## See Also

### Host App Workgroup

- [kAudioUnitProperty_RenderContextObserver](audiotoolbox/kaudiounitproperty_rendercontextobserver.md)
- [AURenderContextObserver](audiotoolbox/aurendercontextobserver.md)