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# volume

The bus’s input volume.

```
var volume: Float { get set }
```

## Discussion

The default value is `1.0`, and the range of valid values is `0.0` to `1.0`. Only the [`AVAudioEnvironmentNode`](/documentation/AVFAudio/AVAudioEnvironmentNode) and the [`AVAudioMixerNode`](/documentation/AVFAudio/AVAudioMixerNode) implement this property.

---

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