To use audio and video in most meetings, you must have a full-duplex sound card. A full-duplex sound card allows you to record and play audio simultaneously. To verify that your sound card is full duplex, check your sound card documentation.

You can use the Sound Recorder program on your computer to test your sound card's capabilities. To open the Sound Recorder, choose Start - Programs - Accessories - Entertainment - Sound Recorder.

To test your sound card:

1. Choose File - New.
2. Click the Record button (the button with the red circle).
3. Speak into your microphone to record your voice.
4. Click the Stop button.
5. Choose File - Save As, and then name and save the file.
6. To play the sound file, open the file and click the Play button.