SpVoice Rate property (SAPI 5.4)
Microsoft Speech API 5.4
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.
|Set:||SpVoice.Rate = Long|
|Get:||Long = SpVoice.Rate|
The owning object.
Set: A Long variable that sets the property value.
Get: A Long variable that gets the property value.
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 vertical scroll bar called VScroll1
- A horizontal scroll bar called 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 Form_Load() On Error GoTo EH 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 EH: If Err.Number Then ShowErrMsg End Sub Private Sub Command1_Click() On Error GoTo EH V.Speak "The quick brown fox jumped over the lazy dog.", SVSFlagsAsync EH: If Err.Number Then ShowErrMsg 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 Private Sub ShowErrMsg() ' Declare identifiers: Dim T As String T = "Desc: " & Err.Description & vbNewLine T = T & "Err #: " & Err.Number MsgBox T, vbExclamation, "Run-Time Error" End End Sub