---
title: "SpeechSynthesisUnregisterModuleURL(_:)"
framework: applicationservices
role: symbol
role_heading: Function
path: applicationservices/1462511-speechsynthesisunregistermoduleu
---

# SpeechSynthesisUnregisterModuleURL(_:)

Unregisters a registered speech synthesizer or voice.

## Declaration

```swift
func SpeechSynthesisUnregisterModuleURL(_ url: CFURL) -> OSErr
```

## Parameters

- `url`: The file URL of the synthesizer plug-in or voice to unregister.

## Return Value

Return Value A resultcode. See Result Codes.

## Discussion

Discussion The SpeechSynthesisUnregisterModuleURL function unregisters the speech synthesizer or voice specified by url. When a synthesizer is unregistered, all voices that require that synthesizer are automatically unregistered. Note that if a speech channel is currently using a synthesizer or voice that becomes unregistered, the speech channel is considered inactive and will return an error when the application tries to access it. An application that called SpeechSynthesisRegisterModuleURL(_:) to register a synthesizer or voice should do the following if the volume containing the synthesizer or voice is about to be unmounted: Call DisposeSpeechChannel(_:) to dispose of each speech channel that uses the synthesizer or voice Call SpeechSynthesisUnregisterModuleURL to unregister the synthesizer or voice If you call SpeechSynthesisUnregisterModuleURL to unregister a synthesizer or voice and you receive either the noSynthFound or voiceNotFound result codes, it means that the synthesizer or voice is not currently registered.

## See Also

### Registering and Unregistering Synthesizers and Voices

- [SpeechSynthesisRegisterModuleURL(_:)](applicationservices/1459624-speechsynthesisregistermoduleurl.md)