Does anyone know of an interface that can be used to output 5.1 Audio from a Macintosh? I have found a few (Gryffin Firewave and M-Audio 410) but I don't know if they work with Final Cut Pro or DVD Studio Pro. I don't need to mix 5.1 (although I can with Logic) I just need to be able to hear it. I have a Yamaha Surround Sound system that requies 6 RCA miniplugs, so that would have to be the interface's output. Inut can be either optical out or fiewire.