Microsoft Speech SDK

Speech Automation 5.1

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Interface: ISpeechRecognizer

AudioInput Property

The AudioInput property gets and sets the recognizer's audio input device.

Syntax

Set:	SpeechRecognizer.AudioInput = SpObjectToken
Get:	SpObjectToken = SpeechRecognizer.AudioInput

Parts

SpeechRecognizer

The owning object.

SpObjectToken

Set: An SpObjectToken object that sets the property. If this parameter is Nothing, the default audio input device will be used.
Get: An SpObjectToken object that sets the property.

Example

The following Visual Basic form code demonstrates the use of the AudioInput property. The current audio input device (commonly a sound card) is displayed. To run this code, create a form with the following control:

A command button called Command1

Paste this code into the Declarations section of the form.

The Command1 procedure creates a new recognizer object and displays the default audio input device. It then sets the recognizer's AudioInput property to Nothing and shows the results. Finally, the procedure lists the names of all available audio input devices.

Option Explicit

Dim R As SpeechLib.SpSharedRecognizer
Dim T As SpeechLib.SpObjectToken

Private Sub Command1_Click()

    Set R = New SpSharedRecognizer
    
    Debug.Print "New SpSharedRecognizer"
    Debug.Print "   AudioInput: " & R.AudioInput.GetDescription
    Debug.Print
    
    Set R.AudioInput = Nothing
    
    Debug.Print "Set to Nothing"
    Debug.Print "   AudioInput: " & R.AudioInput.GetDescription
    Debug.Print
    
    Debug.Print "Show all available inputs"
    For Each T In R.GetAudioInputs
        Debug.Print "   AudioInput: " & T.GetDescription
    Next
    
End Sub