# trackIndex

> Index of the track in the object that created this provider.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.Experimental.Audio](/engine/6000.3/script-reference/unityengine/experimental/audio.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
public ushort trackIndex { get; }
```

### Remarks

For providers created by the [VideoPlayer](/engine/6000.3/script-reference/unityengine/video/videoplayer.md), this is the index of the audio track in the movie file being played.