I know this is an amateur question, but I haven't attempted this before and need some help. I have a Roland KR-575 digital piano, and just purchased a Logitech Z-560 4.1 PC speaker system--the set consists of a subwoofer and 4 satellites. What I'm wondering is, can I hook them up to the Roland? I've already attempted but no sounds came through the speakers (sound did come through the Roland however). I've got a new Audigy Platinum soundcard, so I don't know if I have the wrong settings or something. Thanks in advance!