---
title: speed
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/animationplaybackcontroller/speed
---

# speed

The animation’s rate of playback.

## Declaration

```swift
@MainActor @preconcurrency var speed: Float { get set }
```

## Discussion

Discussion The animation applies the value of this property as an irrational factor of the unaltered speed. For example, a value of 2 plays the animation twice as fast, a value of 0.5 plays the animation at half speed, and a value of 1 plays the animation at the unaltered rate.

## See Also

### Timing animation playback

- [duration](realitykit/animationplaybackcontroller/duration.md)
- [clock](realitykit/animationplaybackcontroller/clock.md)
- [time](realitykit/animationplaybackcontroller/time.md)