I'm wondering if there is a dock that can simultaneously be connected to my computer for synching, my computer speakers for listening, and a power source charging. That way, I can listen to my music and/or charge it w/o turning on the computer and i don't have to keep on swapping the cable. Does the universal dock do that? I feel like it only has one output and I would have to swap cables or change where it can be connected to. If there isn't one available, is there a splitter cable or something.