You can control the volume of BingoMEGA sounds the way you control any other sounds.
To change the volume settings for the sounds:
Click the Start button on the Taskbar and point to Programs.
Point to Accessories,
then point to Multimedia and choose Volume Control.
The Volume Control dialog box opens.
Use the Wave Output slider to set the volume of ball and command sounds and the Synthesizer slider to set the volume of background sounds.
Close Volume Control when you are finished.