# Exists(ProcessorInstance)

> Test whether processorInstance is valid and belongs to this ControlContext.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Audio](/engine/6000.5/script-reference/unityengine/audio.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
public bool Exists(ProcessorInstance processorInstance)
```

### Parameters

**** (\[ProcessorInstance]\(/engine/6000.5/script-reference/unityengine/audio/processorinstance)): 

### Returns

| Type                                                          | Description |
| ------------------------------------------------------------- | ----------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) |             |