Uh-Oh! Mute your computer’s sound right away, to stop the feedback, then mute all of your team mates. Once everyone is muted, you can turn your computer volume back on, and unmute each person until you identify the culprit. Once identified, you can troubleshoot why there is feedback. The most common cause is not wearing headphones, which makes it likely that a users computer will pick up on the host feed, and send that signal back to all participants, creating a compounding effect. If you are absolutely unable to use headphones, try lowering your volume, in order to reduce the amount of feedback. If you are unable to resolve it in this way, unfortunately you may need to stay on text chat mode.