---
title: masterClock
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmtimebase/masterclock
---

# masterClock

## Declaration

```swift
var masterClock: CMClock? { get }
```

## See Also

### Deprecations

- [master](coremedia/cmtimebase/master.md)
- [masterTimebase](coremedia/cmtimebase/mastertimebase.md)
- [ultimateMasterClock](coremedia/cmtimebase/ultimatemasterclock.md)