[songpony]

The dual-display is a feature of the card. It allows for the desktop (what is seen on your monitor) to be extended to a second display. This will let the singer see the song lyrics full-screen on their display (TV) while you see the Hoster program and your computer desktop on your display (computer monitor). This setting is selected from within Control Panel, Display on your computer. If you don't have a dual-display card, you and the singer will see the same thing, which will cause you problems.