My newbie status will be showing here: Can you use both the optical and analog audio out connections at the same time on DVD players, cable boxes, TV's etc.? Or does plugging one type in usually disable the other? I am trying to run two audio systems with my home theater: an expensive analog setup and a cheap 5.1 AV system. Can I run them both at the same time? If not, do "Y" connectors (analog) work well? I'd love to hear from the purists as well as the practical types. Thanks.