If you are experiencing choppy audio, or the voice sounds like it is coming through a fan, following the steps below may resolve the problem.

1. Click the button if you are still connected to a conference.
   
    
2. Open the Preferences dialog by selecting Preferences under the Tools menu in GP4.



3. Select the Audio Setup tab in the Preferences dialog.



4. With the Preferences dialog still open, click the call button on the GP4 interface. 
   You will now enter the 'echo' test where you will be prompted to speak so you can listen to your voice quality.
   
    
5. Click on the slider control to the right of the Audio Output label on the Preferences dialog.



6. Using the right arrow key on the keyboard, adjust the Audio Output up one step at a time until the voice playback sounds good.
   Wait at least two seconds between each increase of the Audio Output level for the change to take effect.
   Note: Only increase the setting to the point where the sound is no longer choppy.
   Increasing more than is needed may cause unwanted audio delay. The left arrow key can be used to decrease the setting.
   
   
    
7. Click the button on the Audio Setup dialog.
   
    
8. Click the button on the GP4 interface to disconnect from the echo test call, or wait for approximately one minute after the announcement ends.