1. Click the '^' next to the "Mute" button
   
   


2. Select "Audio Settings..."
   
   


3. To change which speaker or microphone your computer is using for the meeting, select the appropriate device from the drop-down menu. Which device should be used will differ depending on the computer
   
   


4. You can also adjust the speaker and microphone volume here. Turning one or both down can help stop echoing