server.mrcp2.rsspeechsynth.errorOnNoAudio
                                                    Determines whether it is an error when Vocalizer does not generate audio.
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                                                                     Value  | 
                                                                
                                                                     Boolean DEFAULT: 0  | 
                                                            
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                                                                     How to set  | 
                                                                
                                                                     If using the Management Station, set on the Speech Server service. If not using Management Station, set in an NSS configuration file (user-NSSxx.txt).  | 
                                                            
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                                                                     Usage  | 
                                                                
                                                                     Rarely changed.  | 
                                                            
Use this parameter to inform the application that a synthesis requests did not result in generated audio. For example, if a SPEAK request includes only a dot (".").
By default, if Vocalizer does not report an error provided the request is correctly-formed: the completion cause is 000 ("normal"). When this parameter is set, the system writes the following error to the diagnostic log:
"Completion-Cause: 004 error@#Completion-Reason: "Vocalizer hasn't generated any audio data""
Supported for MRCPv2 browsers. (Ignored for MRCPv1 browsers.)