# Start()

> Enters audio recording mode. After this Unity will output silence until AudioRenderer.Stop is called.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/7000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.AudioModule

```csharp
public static bool Start()
```

### Returns

| Type                                                          | Description                                                                                                                                                               |
| ------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [bool](https://learn.microsoft.com/dotnet/api/system.boolean) | Returns `true` if the engine was switched into output recording mode. It returns `false` if the engine is already recording, or if the platform doesn't support this API. |

### Remarks

While recording, Unity performs audio rendering on the main thread instead of the audio thread, which can increase frame times.