Hello, concerning my yesterday's questions I undertook some research in this forum (query 'full duplex'). I found the following:

 

"To check if the sound card on your computer supports full-duplex audio, start Sound Recorder and record a speech sample for approximately 30 seconds. After this is complete, open a second instance of Sound Recorder. Play the sample you recorded using the first instance of Sound Recorder, and while this is playing, attempt to record a sample using the second instance of Sound Recorder. If the second instance of Sound Recorder is unable to properly record a sample while the first instance is playing, the Sound Card does not support full-duplex audio, and thus does not work with TAPI.

If sound is distorted or otherwise continues to malfunction after you attempt the above procedures, there is most likely a problem with the microphone, sound card hardware, or sound card driver. check with the manufacturer of your sound cards to ensure that you are using the most recent Windows 2000 drivers. Also, replace the microphones and sound cards an affected computers and attempt these tests again."

 

The above described test was successful. I was able to record a speech sample while in the other instance a different sample was playing. In my opinion this is the proof that full duplex is working on my computer.

 

Perhaps this contribution is useful to somebody.

 

hen26ry