By default, a new SpeechSynthesizer object uses the current system voice call DefaultVoice to find out what the default voice is. To specify any of the other speech synthesis text-to-speech voices installed on the user's system, use the Voice method to find out which voices are installed on the system, call AllVoices.
If you don't specify a language, the voice that most closely corresponds to the language selected in the Language control panel is loaded. Initializes a new instance of a SpeechSynthesizer object. Closes the SpeechSynthesizer and releases system resources. Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources. Asynchronously attempts to set the voice used for speech synthesis on an IoT device.
This method is available only in Embedded mode. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. FileNotFoundException , whereas files with an xml extension work well. The voice can be changed by code, using the SpeechSynthesizer 's SetVoice method. The voice can also be changed by using the voice SSML element. All of the attributes are optional, but at least one needs to be included.
It is important to mention that most of these attributes are considered as "preferred values" by the speech synthesizer, so if an appropriate voice that complies with those values is not available, a voice with different attributes will be used. Additionally, the voice's language can be changed when using the p and s elements, which are used to mark the paragraph and sentence structure of the SSML document when the automatically detected structure is not satisfactory to the developer.
Notice that every element that can define a language can define a different one from the one defined in the root speak element, because SSML supports the use of different languages in the same document.
Some changes to the prosody of the speech can be made by adding pauses with the break element, and defining the document structure with the p and s elements all 3 have been explained in previous sections , but the element that provides the more fine-grained control over the prosody of the speech is the prosody element. It can be used to control the pitch and the volume of the voice, among other things.
All of the attributes of the prosody element are considered as "suggestions" by the speech synthesizer, and because of that some of them can be ignored or substituted if the speech processor does not support them. If an application needs to take specific actions depending on the progress of a speech, it can use the mark element. It is an empty element used to mark a specific position in a speech. When the speech synthesizer is playing the speech and finds a mark, it raises a SpeechBookmarkReached event that includes information to identify the mark element that triggered it, which the developer can use to perform any actions required.
To appreciate the results of this example, press F5 to debug your application and keep an eye on the output window as you click the button to start the speech. Notice that two additional steps were required to take advantage of this progress monitoring capability: First, a new typed event handler was added to the synthesizer's BookmarkReached event, and then the handler method itself had to be implemented.
The say-as element can be used to specify the content type of the text contained in the element, so the speech synthesizer knows how to pronounce it correctly. The sub element is used to define an alias for a string. It is probably not particularly useful as it works just as a one-time alias, so its intention is probably to give more clarity to the SSML document by providing a way to have a written and spoken form of the related text.
For this example, we will use a file named SSML1. After the file has been created or added to the project , the final step is to call the SpeakSsmlFromUriAsync method to play it:. Note: The Microsoft's official documentation on TTS for Windows Phone link used to research and test some of the topics included in this article includes an example of an external SSML file with an ssml extension, but using that extension causes an IO.
FileNotFoundException , whereas files with xml extension work well. Office Office Exchange Server. Not an IT pro? Find centralized, trusted content and collaborate around the technologies you use most.
Connect and share knowledge within a single location that is structured and easy to search. I'm developing an app where I would like to pause in between when the SpeechSynthesizer.
SpeakTextAsync is running and resume back from there. But whoever posted, he is a life saver. It stuck my mind and I ended up creating this.
Well, according to the documentation, when you call CancellAll , you're cancelling the Tasks that are executing asynchronously. By contract, this results in an OperationCancelledException being thrown.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 8 years, 9 months ago.
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