im thinking about picking up a mixer and cabling, as i now have 3 desktop computer systems, but only have 1 set of speakers (i have a KVM that switches the keys/mouse... why shouldnt audio be as seemeless?). i stopped in guitar center today, and they had a little mixer (i cant remember if it was 4 or 6, but it was $99), which i think might do the trick. has anyone else ever come across this problem? right now i have 2 lines exiting the computers, that go to a Y cable, and then out to a single which goes to the speaker. when the 2 computer were both HP DC series, they worked fine, but now that one of them is a Mac, the mac kills the HP off the line, and the Y cable isnt going to work anymore.