This could be the result of an overloaded network or computer. An easy way to determine if this is the problem is to ask everybody to stop sending video.

In your Options (Preferences on the Mac) be sure that you and the other participants have properly set the Network Connection setting. This helps the client in avoiding any overload of your uplink.

Read more about this in the Startup Guides at the beginning of the manual and in the network performance chapter.

1. Put your mouse over the person currently speaking and from whom your are experiencing trouble.
2. Open a Private Window to that user by pressing the "P" button.
3. Press the information button, "I" in the private conversation window.
4. This will bring up a network statistics window. You will be able to see packet loss statistics for audio under the Audio panel.
   
   If you see a large percentage of packet loss, long round trip times or high amount of jitter, reduce your video and lower your audio quality.

Read more about this in the Startup Guides at the beginning of the manuals and in the network performance chapter.

1. Make sure your Video follows Audio function is on.
2. Is someone else sending audio inadvertently? Ask that person to stop sending audio or to turn on and calibrate is silence suppression