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# AVAudioSourceNode

An object that supplies audio data.

```
class AVAudioSourceNode
```

## Overview

The `AVAudioSourceNode` class allows for supplying audio data for rendering through [`AVAudioSourceNodeRenderBlock`](/documentation/AVFAudio/AVAudioSourceNodeRenderBlock). It’s a convenient method for delievering audio data instead of setting the input callback on an audio unit with `kAudioUnitProperty_SetRenderCallback`.

## Topics

### Creating an Audio Source Node

[`AVAudioSourceNodeRenderBlock`](/documentation/AVFAudio/AVAudioSourceNodeRenderBlock)

A block that supplies audio data to an audio source node.

[`init(renderBlock:)`](/documentation/AVFAudio/AVAudioSourceNode/init(renderBlock:))

Creates an audio source node with a block that supplies audio data.

[`init(format:renderBlock:)`](/documentation/AVFAudio/AVAudioSourceNode/init(format:renderBlock:))

Creates an audio source node with the audio format and a block that supplies audio data.


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