---
title: kMDItemAudioTrackNumber
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kmditemaudiotracknumber
---

# kMDItemAudioTrackNumber

The track number of a song or composition when it is part of an album. A CFNumber (integer).

## Declaration

```swift
let kMDItemAudioTrackNumber: CFString!
```