---
title: AVAudioUnitVarispeed
framework: avfaudio
role: symbol
role_heading: Class
path: avfaudio/avaudiounitvarispeed
---

# AVAudioUnitVarispeed

An object that allows control of the playback rate.

## Declaration

```swift
class AVAudioUnitVarispeed
```

## Topics

### Getting and setting the playback rate

- [rate](avfaudio/avaudiounitvarispeed/rate.md)

## Relationships

### Inherits From

- [AVAudioUnitTimeEffect](avfaudio/avaudiounittimeeffect.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Time effects

- [AVAudioUnitTimeEffect](avfaudio/avaudiounittimeeffect.md)
- [AVAudioUnitTimePitch](avfaudio/avaudiounittimepitch.md)