hello i need a little help. i have a hercules 7.1 soundcard and want to send a ac3 signal to the external denon home amp i have . I can send it via power dvd but not any divx films. i would love to hear from anyone who can helpme please. Amd 1Ghz processor Hercules 7.1 card ( optic out i'm using) hercules 9000 pro graphic card Denon 1810? home amp with 5.1 system. Anyone any ideas?