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# allowedAudioSpatializationFormats

The source audio channel layouts the player item supports for spatialization.

```
nonisolated var allowedAudioSpatializationFormats: AVAudioSpatializationFormats { get set }
```

## Discussion

Spatialization uses psychoacoustic methods to create a more immersive audio experience when playing content on specialized headphones and speaker arrangements.

The default value for video content is [`monoStereoAndMultichannel`](/documentation/AVFoundation/AVAudioSpatializationFormats/monoStereoAndMultichannel), and [`multichannel`](/documentation/AVFoundation/AVAudioSpatializationFormats/multichannel) for audio-only content. Your app can set a preferred spatialization format, but a user can change the audio spatialization behavior in Control Center.

This property isn’t key-value observable.

> Important:
> It’s incorrect to render binaural recordings with spatialization. Content tagged with a binaural channel layout ignores this property value.

---

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