Hi, I have a Hercules Fortissimmo II sound card, with optical SPDIF out. It's control panel allows you to configure either the main outputs to come out of the optical output, or PowerDVD. When set to main outputs, MP3s and ordinary windows sounds come through, as well non AC3 audio in .avi files. But I get silence with AC3 streams. When set to PowerDVD and AC3 streams come through but nothing else. This means I have to have the analogue output connected as well as the optical output. The problem here is that my PC is already connected to an amp. in one room, and using a simple splitter reduces the output level considerably, meaning I have to turn up the volume alot when listening to analogue audio. What I wanted to know is whether my sound card is just not very flexible, and a better sound card would allow me to send everything through the optical output, or do all cards work in a similar way. Comments greatly appreciated.