XSpeechSynthesizer

Provides support for initializing and configuring a speech synthesis engine, or voice, for converting a text string into an audio stream. This functionality is also known as text-to-speech (TTS).

Functions

Function	Description
XSpeechSynthesizerCloseHandle	Closes the speech synthesizer and releases allocated system resources.
XSpeechSynthesizerCloseStreamHandle	Closes the speech synthesizer stream and releases allocated system resources.
XSpeechSynthesizerCreate	Creates a speech synthesizer.
XSpeechSynthesizerCreateStreamFromSsml	Creates a speech synthesis stream from the specified SSML.
XSpeechSynthesizerCreateStreamFromText	Creates a speech synthesis stream from the specified plain text.
XSpeechSynthesizerEnumerateInstalledVoices	Enumerates the installed voices, and calls the method pointed to by callback for each voice.
XSpeechSynthesizerGetStreamData	Retrieves the data from a speech synthesis stream.
XSpeechSynthesizerGetStreamDataSize	Gets the size of the data buffer from a speech synthesis stream.
XSpeechSynthesizerInstalledVoicesCallback	The client-implemented callback function that receives information about a voice when XSpeechSynthesizerEnumerateInstalledVoices is called.
XSpeechSynthesizerSetCustomVoice	Specifies that the speech synthesizer is to use the specified custom voice.
XSpeechSynthesizerSetDefaultVoice	Specifies that the speech synthesizer is to use the system’s default voice.

Structures

Structure	Description
XSpeechSynthesizerVoiceInformation	Provides information about a voice.

Enumerations

Enumeration	Description
XSpeechSynthesizerVoiceGender	Indicates the gender of a voice.

Conceptual documentation

See also

System API reference

Last modified on August 19, 2026

Related topics

XSpeechSynthesizerCreate XSpeechSynthesizerVoiceGender XSpeechSynthesizerCloseHandle XSpeechSynthesizerVoiceInformation XSpeechSynthesizerCreateStreamFromSsml

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