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

# master

## Declaration

```swift
var master: any CMSyncProtocol { get set }
```

## See Also

### Deprecations

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