---
title: timebase
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avsamplebufferrendersynchronizer/timebase
---

# timebase

The synchronizer’s rendering timebase which determines how it interprets timestamps.

## Declaration

```swift
var timebase: CMTimebase { get }
```

## Discussion

Discussion The default for this property is the clock for an added AVSampleBufferAudioRenderer object. If you haven’t added a renderer, the timebase is the system host clock.

## See Also

### Accessing time information

- [currentTime()](avfoundation/avsamplebufferrendersynchronizer/currenttime().md)
- [rate](avfoundation/avsamplebufferrendersynchronizer/rate.md)
- [setRate(_:time:)](avfoundation/avsamplebufferrendersynchronizer/setrate(_:time:).md)
- [setRate(_:time:atHostTime:)](avfoundation/avsamplebufferrendersynchronizer/setrate(_:time:athosttime:).md)
- [rateDidChangeNotification](avfoundation/avsamplebufferrendersynchronizer/ratedidchangenotification.md)
- [delaysRateChangeUntilHasSufficientMediaData](avfoundation/avsamplebufferrendersynchronizer/delaysratechangeuntilhassufficientmediadata.md)