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# supportedOutputChannelLayouts

The array of channel layouts that the current route supports.

```
var supportedOutputChannelLayouts: [AVAudioChannelLayout] { get }
```

## Discussion

The possible channel layouts for this property are:

- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Stereo>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_AAC_5_1>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_MPEG_7_1_C>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Atmos_5_1_2>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Atmos_5_1_4>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Atmos_7_1_2>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Atmos_7_1_4>
- <doc://com.apple.documentation/documentation/CoreAudioTypes/kAudioChannelLayoutTag_Atmos_9_1_6>

This value returns an empty array when the audio session is inactive, ineligible for Now Playing, or the port type isn’t [`carAudio`](/documentation/AVFAudio/AVAudioSession/Port/carAudio) or, in iOS 18 or later, [`airPlay`](/documentation/AVFAudio/AVAudioSession/Port/airPlay).

Use [`renderingCapabilitiesChangeNotification`](/documentation/AVFAudio/AVAudioSession/renderingCapabilitiesChangeNotification) to listen for updates from the system.

---

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