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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.

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

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

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

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

## Relationships

### Conforms To

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

[`AVAudio3DMixing`](/documentation/AVFAudio/AVAudio3DMixing)

[`Hashable`](/documentation/Swift/Hashable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

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

[`CVarArg`](/documentation/Swift/CVarArg)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

### Inherits From

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

---

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