---
title: AVMusicTimeStamp
framework: avfaudio
role: symbol
role_heading: Type Alias
path: avfaudio/avmusictimestamp
---

# AVMusicTimeStamp

A fractional number of beats.

## Declaration

```swift
typealias AVMusicTimeStamp = Double
```

## Discussion

Discussion Use this value for all sequencer timeline-related methods. The tempo of the sequence determines the relationship between this value and time (in seconds).

## See Also

### Managing Time Stamps

- [hostTime(forBeats:error:)](avfaudio/avaudiosequencer/hosttime(forbeats:error:).md)
- [seconds(forBeats:)](avfaudio/avaudiosequencer/seconds(forbeats:).md)