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The SpeechStudio TAPI Control is an ActiveX control
that connects SAPI 5 text-to-speech (TTS) and speech recognition (SR) audio
streams to telephony devices supported by TAPI. The control is designed to be
accessed from any language that supports COM automation, including Visual Basic
and Visual C++. It works with all versions of Windows that support SAPI 5 and
with all versions of TAPI, although some methods are only relevant for clients
using TAPI version 3.
The product includes an ActiveX control,
documentation, code examples in Visual Basic and Visual C++, and technical
support.
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Visual Basic Samples
Two Visual Basic sample programs are included
with TAPI Control. The sample
programs, T2Answer and T3Answer, are identical in function. Both
programs show how to answer the phone, speak a prompt using text-to-speech, and
then listen to dictation for a set amount of time. They differ in their
implementation: T2Answer uses TAPI version 2 and T3Answer
uses the automation interface of TAPI version 3.
Both sample programs require a TAPI-compatible voice modem to
answer incoming calls. The T2Answer program should run on any system supported
by SAPI 5 and the SpeechStudio TAPI Control. Because the T3Answer program uses
the automation interface of TAPI version 3, it requires Windows 2000, Windows
XP, or Windows .NET Server.
Visual Studio .Net C# Sample
The C# sample program uses a voice modem or
similar device to dial a phone number and deliver a short voice message using
using text-to-speech.
Visual C++ Sample
The Visual C++ sample program, TTSOutgoing,
uses TAPI version 3 and therefore only runs on Windows 2000 or newer Windows
NT-based operating systems, such as Windows XP and Windows .NET Server. It uses
a voice modem or similar device to dial a phone number and deliver a short voice
message using using text-to-speech.
Buy TAPI Control!
ITAPIControl interface
The control implements the ITAPIControl interface,
which provides the following methods:
| Method |
Description |
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CreateInputStream |
Creates and initializes a SAPI
5 audio input stream. |
|
CreateOutputStream |
Creates and initializes a SAPI
5 audio output stream. |
|
GetDeviceIDWaveIn |
Returns the wave/in device
identifier for a TAPI call object. |
|
GetDeviceIDWaveOut |
Returns the wave/out device
identifier for a TAPI call object. |
With this interface, associating a TAPI device
with an audio stream is a two-step process:
1. Get the device identifier for the TAPI
device.
2. Create a SAPI 5 audio stream for the device.
The TAPI Control will automatically initialize the audio stream with an audio
format supported by both the device and SAPI.
For a TAPI version 3 client, call
GetDeviceIDWaveIn or GetDeviceIDWaveOut to get the device identifier. Clients of
older versions of TAPI can call the TAPI function lineGetID to get the device
identifier.
To create the SAPI 5 audio stream, call the
CreateInputStream or CreateOutputStream method. This method returns an audio
stream object that SAPI can use to do TTS or speech recognition.
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