---
title: duration
framework: avfaudio
role: symbol
role_heading: Instance Property
path: avfaudio/avmidinoteevent/duration
---

# duration

The duration for the note, in beats.

## Declaration

```swift
var duration: AVMusicTimeStamp { get set }
```

## See Also

### Configuring a MIDI Note Event

- [channel](avfaudio/avmidinoteevent/channel.md)
- [key](avfaudio/avmidinoteevent/key.md)
- [velocity](avfaudio/avmidinoteevent/velocity.md)