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Intelligent Interface Technologies Home Page Microsoft Speech SDK

Speech Automation 5.1

Object: SpVoice

Rate Property


The Rate property gets and sets the speaking rate of the voice.

Values for the Rate property range from -10 to 10, which represent the slowest and the fastest speaking rates, respectively.

At the beginning of each Speak or SpeakStream method, the voice sets its speaking rate according to the value of its Rate property, and speaks the entire stream at that rate. The Rate property can be changed at any time, but the actual speaking rate will not reflect the changed property value until it begins a new stream.


Syntax

Set: SpVoice.Rate = Long
Get: Long = SpVoice.Rate

Parts

SpVoice
The owning object.
Long
Set: A Long variable that sets the property value.
Get: A Long variable that gets the property value.

Example

The following Visual Basic form code demonstrates the use of the Rate and the Volume properties. To run this code, create a form with the following controls:

  • A command button called Command1
  • A text box called Text1
  • A VScrollbar called VScroll1
  • An HScrollbar HScroll1
  • Paste this code into the Declarations section of the form.

    The Form_Load procedure creates a voice object and associates the VScrollbar with the voice's Volume property and the HScrollbar with the voice's Rate property. Adjusting the scroll bars changes the settings of the Volume and Rate properties. The Command1_Click procedure speaks a phrase in order to demonstrate the effects of the changes.


    Option Explicit
    
    Private V As SpeechLib.SpVoice
    
    Private Sub Command1_Click()
        V.Speak "The quick brown fox jumped over the lazy dog.", SVSFlagsAsync
    End Sub
    
    Private Sub Form_Load()
    
        Set V = New SpeechLib.SpVoice
        
        VScroll1.Min = 0
        VScroll1.Max = 100
        VScroll1.Value = V.Volume
        
        HScroll1.Min = -10
        HScroll1.Max = 10
        HScroll1.Value = V.Rate
        
        Text1.Text = "Vol: " & VScroll1.Value & ";  Rate: " & HScroll1.Value
        
    End Sub
    
    Private Sub HScroll1_Change()
        V.Rate = HScroll1.Value
        Text1.Text = "Vol: " & VScroll1.Value & ";  Rate: " & HScroll1.Value
    End Sub
    
    Private Sub VScroll1_Change()
        V.Volume = VScroll1.Value
        Text1.Text = "Vol: " & VScroll1.Value & ";  Rate: " & HScroll1.Value
    End Sub


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