---
title: rate
framework: avfaudio
role: symbol
role_heading: Instance Property
path: avfaudio/avspeechutterance/rate
---

# rate

The rate the speech synthesizer uses when speaking the utterance.

## Declaration

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

## Discussion

Discussion The speech rate is a decimal representation within the range of AVSpeechUtteranceMinimumSpeechRate and AVSpeechUtteranceMaximumSpeechRate. Lower values correspond to slower speech, and higher values correspond to faster speech. The default value is AVSpeechUtteranceDefaultSpeechRate. Set this property before enqueing the utterance because setting it afterward has no effect.

## See Also

### Configuring utterance timing

- [AVSpeechUtteranceMinimumSpeechRate](avfaudio/avspeechutteranceminimumspeechrate.md)
- [AVSpeechUtteranceMaximumSpeechRate](avfaudio/avspeechutterancemaximumspeechrate.md)
- [AVSpeechUtteranceDefaultSpeechRate](avfaudio/avspeechutterancedefaultspeechrate.md)
- [preUtteranceDelay](avfaudio/avspeechutterance/preutterancedelay.md)
- [postUtteranceDelay](avfaudio/avspeechutterance/postutterancedelay.md)