Assuming your sound card supports 5 speakers (4:1) and you
have them hooked up correctly to the card, then soundcards
such as Soundblaster Audigy come with software that lets
you choose between different speaker set-ups. The shortcut
to Such software would be located on the start menu a(for
instance with my Soundblaster Audigy it's in
start>programs>Creative>soundblaster audigy>creative audio
HQ)
