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# sendLevel

The amount of audio signal to add to the output.

```
var sendLevel: Double { get set }
```

## Discussion

The framework clamps the value to the range between `0` and `1`, where `0` silences the audio and `1` passes the audio through to the output at full volume. The default value is `1`.

When an app adds the entry’s spatial pipeline (see [`entries`](/documentation/PHASE/PHASESpatialPipeline/entries)) to a sound event, the framework observes no further adjustments to this property. To change the send level after that, adjust the [`sendLevelMetaParameterDefinition`](/documentation/PHASE/PHASESpatialPipelineEntry/sendLevelMetaParameterDefinition).

---

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