This is a 4 disc set in which you have to play all four discs at the same time. I finally got it set it up in my room and it's absolutely incredible to listen to. One is playing on my computer speakers, one on my Stereo's CD player, one on my iPod, which is hooked up to another set of computer speakers, and my portable CD player, hooked up to yet another set of computer speakers.
Yeah, you have to start all of the CDs at the same time. I had a friend over when we turned it on so we each took control of two devices. It took a few tries to get it in sync but we got it.
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