DefaultEngine.ini file.
To enable voice in the DefaultEngine.ini file[project name]/Config folder, open the DefaultEngine.ini file.[Voice] bEnabled=true
DefaultEngine.ini file.VoiceCapture - CreateVoiceCapture: voice module does not have voice enabled, this means that voice is not enabled in the project’s DefaultEngine.ini file. For more information, see the To enable voice in the DefaultEngine.ini file process above.