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# AVAudioEnvironmentOutputType

The output types for using with the automatic 3D mixing rendering algorithm.

```
enum AVAudioEnvironmentOutputType
```

## Overview

The output type determines the rendering method for any input bus using [`AVAudio3DMixingRenderingAlgorithm.auto`](/documentation/AVFAudio/AVAudio3DMixingRenderingAlgorithm/auto). To configure the output type, set [`outputType`](/documentation/AVFAudio/AVAudioEnvironmentNode/outputType) on [`AVAudioEnvironmentNode`](/documentation/AVFAudio/AVAudioEnvironmentNode).

## Topics

### Output Types

[`AVAudioEnvironmentOutputTypeAuto`](/documentation/AVFAudio/AVAudioEnvironmentOutputType/auto)

Automatically detects the playback route and picks the correct output.

[`AVAudioEnvironmentOutputTypeHeadphones`](/documentation/AVFAudio/AVAudioEnvironmentOutputType/headphones)

Renders the audio output for headphones.

[`AVAudioEnvironmentOutputTypeBuiltInSpeakers`](/documentation/AVFAudio/AVAudioEnvironmentOutputType/builtInSpeakers)

Renders the audio output for built-in speakers on the current hardware.

[`AVAudioEnvironmentOutputTypeExternalSpeakers`](/documentation/AVFAudio/AVAudioEnvironmentOutputType/externalSpeakers)

Renders the audio output for external speakers according to the audio environment node’s output channel layout.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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