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SpeechSynthesizer.Rate Property

Gets or sets the speaking rate of the SpeechSynthesizer object.

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

public int Rate { get; set; }

Property Value

Type: System.Int32
Returns the speaking rate of the SpeechSynthesizer object, from -10 through 10.

The following example speaks a string with the speaking rate set to -2.

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();

      // Set a value for the speaking rate.
      synth.Rate = -2;

      // Configure the audio output. 

      // Speak a text string synchronously.
      synth.Speak("This example speaks a string with the speaking rate set to -2.");

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

.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.

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