# id

> Unique identifier for this instance.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.Experimental.Audio](/engine/7000.0/script-reference/unityengine/experimental/audio.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
public uint id { get; }
```

### Remarks

This is the id that is expected when invoking the native function pointer [AudioSampleProvider.consumeSampleFramesNativeFunction](/engine/7000.0/script-reference/unityengine/experimental/audio/audiosampleprovider/consumesampleframesnativefunction-1.md). This is also the id that is passed in to the native event handlers of type [AudioSampleProvider.SampleFramesEventNativeFunction](/engine/7000.0/script-reference/unityengine/experimental/audio/audiosampleprovider/sampleframeseventnativefunction.md).

Identifiers are not recycled throuhout the application' lifetime.