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# default

The default distance attenuation, which uses a rolloff model that mimics real-world physics.

```
static let `default`: Audio.DistanceAttenuation
```

## Discussion

The [`Audio.DistanceAttenuation.rolloff(factor:)`](/documentation/RealityKit/Audio/DistanceAttenuation/rolloff(factor:)) model attenuates spatial audio with a factor of `1.0` as the listener moves away from the source.

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