'SimplePhone' sample with 'APSoundDevice' Audio Provider

What is 'SimplePhone'? 

SimplePhone is a Visual Basic 2005 Diva Component API sample that makes or receives voice calls through a Diva hardware adapter (analog, basic rate ISDN or E1/T1) or through a Diva virtual adapter such as Diva SoftIP - SIP. 

SimplePhone uses the APSoundDevice Audio Provider DLL (provided here as both a Visual C project:  and as a compiled DLL: ) to interface to the sound hardware in the PC so that you can use microphone and speakers (or a headset) connected to the PC. APSoundDevice is written using the Diva C/C++ API. 

This sample serves three purposes:

• It shows how to create an Audio Provider using the Diva C/C++ API

• It shows how to access an Audio Provider from a program that uses the Diva Component API

• It shows how to create an application that uses the Diva Component API for the top-level GUI interface while the Diva C/C++ API is used for timing-critical low-level streaming operations.

Audio Providers 

Using the APSoundDevice sample as a basis, you can write an Audio Provider to interface to other media hardware devices or to 3rd-party software modules such as text to speech (TTS) and automated speech recognition (ASR) engines. 

A sample Audio Provider that provides an interface to the Microsoft Speech API (SAPI) is supplied in the 'samples\Visual_C++\MS_Speech\SAPIAudioProvider' directory in the Diva SDK.

This approach is also appropriate for other applications that process voice or fax streams in real-time. 

Using SimplePhone 

• If you have not already done so, please download and install the Diva SDK

• Download the SimplePhone executables ( ). Unzip the files and ensure that SimplePhone.exe, APSoundDevice.dll and DIVASDKLib.dll are all in the same directory.

• Run SimplePhone.exe.

Common problems

• "Load APSoundDevice failed - Check SDK version" - You haven't installed the latest version of the Diva SDK.

• "Load APSoundDevice failed - check DLL is present" - The AudioProvider.dll is not in the same directory as SimplePhone.exe

• "Could not load file or assembly 'Interop.DIVASDKLib" - The DIVASDKLib.dll is not in the same directory as SimplePhone.exe

• "SDK initialisation failed - re-install SDK" - The Diva SDK is not installed

• "No Diva hardware or software devices found" - No Diva hardware or virtual adapters found

Downloads

• (zip)

•  (text)

•  (zip)

• (zip)