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# AudioUnitExtensionSetComponentList(_:_:)

Allows the implementor of an audio unit extension to dynamically modify the list of component registrations for the extension.

```
func AudioUnitExtensionSetComponentList(_ extensionIdentifier: CFString, _ audioComponentInfo: CFArray?) -> OSStatus
```

## Parameters

`extensionIdentifier`

The bundle identifier of the audio unit extension.

`audioComponentInfo`

An array of dictionaries, one for each component registration.

## Return Value

An OSStatus result code.

## Discussion

The bundle identifier of the process that calls this function must prefix or match the extension identifier.

For an example of the array of dictionaries, see [Audio Components](/documentation/AudioToolbox/audio-components).

---

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