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PromptBreak Enumeration

Enumerates values for intervals of prosodic separation (breaks) between word boundaries.

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

'Declaration
Public Enumeration PromptBreak

Member nameDescription
ExtraLargeIndicates an extra-large break.
ExtraSmallIndicates an extra-small break.
LargeIndicates a large break.
MediumIndicates a medium break.
NoneIndicates no break.
SmallIndicates a small break.

The values in the PromptBreak enumeration represent a range of separation intervals (pauses) between word boundaries. The speech synthesis engine determines the exact duration of the interval. When a break is requested, one of these values is passed to the text-to-speech (TTS) engine, which contains a mapping between these values and the corresponding millisecond break values.

The value None represents the absence of a pause between word boundaries and can be used to remove a break where one would normally occur. The remaining values are listed in order of increasing durations for breaks.

The following example builds a prompt containing two sentences separated by a break and speaks the prompt to the default audio device on the computer.

using System;
using System.Speech.Synthesis;

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

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

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

        // Build a prompt with two sentences separated by a break.
        PromptBuilder builder = new PromptBuilder(
          new System.Globalization.CultureInfo("en-US"));
        builder.AppendText(
          "Tonight's movie showings in theater A are at 5:45, 7:15, and 8:45.");
        builder.AppendBreak(PromptBreak.Medium);
        builder.AppendText(
          "Tonight's movie showings in theater B are at 5:15, 7:30, and 9:15.");

        // Speak the prompt.
        synth.Speak(builder);
      }

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4
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