Export (0) Print
Expand All

SpeechSynthesizer.SpeakSsmlAsync Method

Asynchronously speaks a String that contains SSML markup.

Namespace:  System.Speech.Synthesis
Assembly:  System.Speech (in System.Speech.dll)

public Prompt SpeakSsmlAsync(
	string textToSpeak
)

Parameters

textToSpeak
Type: System.String

The SMML markup to speak.

The contents of the textToSpeak parameter must include a speak element and must conform to the Speech Synthesis Markup Language (SSML) Version 1.0. For more information, see Speech Synthesis Markup Language Reference.

To synchronously speak a string that contains SSML markup, use the SpeakSsml method. You can use SpeakAsync to initiate the asynchronous speaking of a string that does not contain SSML markup.

During a call to this method, the SpeechSynthesizer can raise the following events:

  • StateChanged. Raised when the speaking state of the synthesizer changes.

  • SpeakStarted. Raised when the synthesizer begins generating speech.

  • PhonemeReached. Raised each time the synthesizer reaches a letter or combination of letters that constitute a discreet sound of speech in a language.

  • SpeakProgress. Raised each time the synthesizer completes speaking a word.

  • VisemeReached. Raised each time spoken output requires a change in the position of the mouth or the facial muscles used to produce speech.

  • BookmarkReached. Raised when the synthesizer encounters a bookmark in a prompt.

  • VoiceChange. Raised when the speaking voice for the synthesizer changes.

  • SpeakCompleted. Raised when the synthesizer finishes processing a SpeakSsmlAsync operation.

If your application dos not need to perform tasks while speaking, you can use the Speak or the SpeakSsml method to generate speech synchronously.

using System;
using System.Speech.Synthesis;

namespace SampleSynthesis
{
  class Program
  {
    static void Main(string[] args)
    {

      // Initialize a new instance of the SpeechSynthesizer.
      SpeechSynthesizer synth = new SpeechSynthesizer();

      // Configure the audio output. 
      synth.SetOutputToDefaultAudioDevice();

      // Build an SSML prompt in a string.
      string str = "<speak version=\"1.0\"";
      str += " xmlns=\"http://www.w3.org/2001/10/synthesis\"";
      str += " xml:lang=\"en-US\">";
      str += "<say-as type=\"date:mdy\"> 1/29/2009 </say-as>";
      str += "</speak>";

      // Speak the contents of the prompt asynchronously.
      synth.SpeakSsmlAsync(str);

      Console.WriteLine("Press any key to exit...");
      Console.ReadKey();
    }
  }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft