---
title: rate
framework: phase
role: symbol
role_heading: Instance Property
path: phase/phasegeneratornodedefinition/rate
---

# rate

A playback speed for the node’s audio.

## Declaration

```swift
var rate: Double { get set }
```

## Discussion

Discussion The value clamps to the range [0.25, 4]. The default value is 1, which doesn’t change the source audio’s rate. Values higher than 1 speed up playback, and lower values slow it down.

## See Also

### Controlling Audio Playback

- [rateMetaParameterDefinition](phase/phasegeneratornodedefinition/ratemetaparameterdefinition.md)
- [gainMetaParameterDefinition](phase/phasegeneratornodedefinition/gainmetaparameterdefinition.md)