Hi, I recently received a speaker sound system for my computer for Christmas, the Logitech X-530s' (http://www.logitech.com/index.cfm/products/details/US/EN,CRID=2,CONTENTID=9067). However to get all of the speakers to work at once, I needed an audio adapter, so I bought this one: http://www.usbgear.com/USBG-SOUNDX.html However, I have never been very audio savvy, and I still can't get all of the speakers to play at once. I tested them out and I know they all work, but I want them to all play at once. I am using an iBook G4, and running on Mac OS X 10.4.3. Any help at all would be greatly appreciated, thank you very much for reading.