![]() ![]() Accordingly, the character's mouth would move, or even close. The viseme essentially represents a change in the mouth position during speech. For instance, if your application is animating a character for speech, you would be interested each time a new viseme is encountered. SPEVENTENUM lists these possible activities. A multitude of activities involving SAPI or speech engines could interest the application. Interests are unique to SAPI.įurthermore, the interaction is not limited to determining words spoken. This includes a brief explanation about speech messages and a related feature, interests. In doing so, the application also demonstrates the eventing model for SAPI. In two separate examples using this information, the application displays the words on the screen and highlights them in real time. However, using this interaction, the application determines words being spoken. Text-to-speech would be marginally useful if that is all it did. More importantly, it demonstrates the interaction between SAPI and the application. However, the sample does represent the foundation of text-to-speech and showcases many of those mechanisms. A more complete or robust application would retrieve the text from a dialog box, resource, or file. The sentence is hard coded, something few applications would do in a practical situation. This sample is not a practical one since it speaks only one sentence. The application does not display anything other than "Hello, World" along the top of the screen. Compile and run the application to make sure everything works. The code handling the event from this menu item will be addressed later in this example. To use the current example in Visual C++, the user should add a File menu item called Speak with a resource ID of IDM_SPEAK. To be able to speak on demand, one modification is required this is a mechanism to initiate speech.
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