I've hooked up my old Boston BA 735 digital speakers and subwoofer that came with my old Gateway PC to my PowerBook and can get (what appears to be) mono sound using the anologue input, but was wondering if I could get the digital audio to work? I have the digital lead which can also fit into the 3.5mm headphone jack on my PowerBook but no sound is output when I plug it in. I'm assuming I need a driver. Is one available for the Mac? Where could I download it from? Would it work with the PB 12" or does it require a G5 tower? I heard Macs were behind PCs in the sound stakes.