Ok so i have a sound system at a school auditorum and is attached to speakers surrounding the auditorum...let me get to the point the sound system has jacks a microphone jack a line jack(for old microphones) and a jack from a computer with is a ethernet hub. I have seen it before where a computer is plug into that ethernet and sound is being transported from the computer to the ethernet cable witch is playing through the sound system.....the tech guy that waz there left and soon i have to play a dvd presentation and i want to lnow how can i transport sound from the computer to an ethernet jack to be played from the sound system.. is there a program or something a driver... please i need your help also not for presentation but for future events using a computer