---
title: kCMTimebaseNotification_EffectiveRateChanged
framework: coremedia
role: symbol
role_heading: Global Variable
path: coremedia/kcmtimebasenotification_effectiveratechanged
---

# kCMTimebaseNotification_EffectiveRateChanged

A notification that posts by a timebase after a change in effective rate.

## Declaration

```swift
let kCMTimebaseNotification_EffectiveRateChanged: CFString
```

## See Also

### Constants

- [kCMTimebaseNotification_TimeJumped](coremedia/kcmtimebasenotification_timejumped.md)