John, I like the looks of that Xitel unit, but I have one question. You said it plugs into a USB output on the computer. Is there actually a USB output that would be different from a USB input? I know I have USB input jacks on my computer, but I am not sure about USB outputs. Xitel's website says you can plug it into any USB port. Are all USB ports both in and out ports? (I know less about computers than I do aout surround sound.)

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