What property of the SpeechConfig object should you set to a specific voice name for speech synthesis?

In order to specify a particular voice for speech synthesis in Microsoft Azure, the SpeechSynthesisVoiceName property of the SpeechConfig object must be set to the desired voice name. This property directly controls which voice will be used when the Azure Speech service synthesizes speech from text. By defining the voice name, developers can choose from a variety of available voices that suit the needs of the application or enhance user experience through voice variety or personality.

The other properties, while integral to the general configuration of speech synthesis, do not control the choice of voice. The SpeechSynthesisOutputFormat property pertains to the format of the output audio, which does not influence the voice used. AudioConfig relates to the settings for audio input/output configurations, such as specifying audio file formats or streaming methods, but it doesn't set the voice. SpeechRecognitionLanguage targets the language used for understanding spoken input, thus it is not relevant to speech synthesis which is concerned with converting text to spoken audio. Therefore, to set a specific voice name for speech synthesis, the SpeechSynthesisVoiceName property is the correct choice.