---
title: masterTimebase
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmtimebase/mastertimebase
---

# masterTimebase

## Declaration

```swift
var masterTimebase: CMTimebase? { get }
```

## See Also

### Deprecations

- [master](coremedia/cmtimebase/master.md)
- [masterClock](coremedia/cmtimebase/masterclock.md)
- [ultimateMasterClock](coremedia/cmtimebase/ultimatemasterclock.md)