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PromptBreak Enumeration

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

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

public enum PromptBreak

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

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 sends the output to a WAV file for playback.

using System;
using Microsoft.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.SetOutputToWaveFile(@"C:\test\ShowTimes.wav");

        // Create a SoundPlayer instance to play the output audio file.
        System.Media.SoundPlayer m_SoundPlayer =
          new System.Media.SoundPlayer(@"C:\test\ShowTimes.wav");

        // 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, 7:15, and 9:15");

        // Speak the prompt and play back the output file.
        synth.Speak(builder);
        m_SoundPlayer.Play();
      }

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

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