Hi guys. Got a G5 Power Mac here running 10.5.8 and Logitech 5.1 Z-5500 Digital speakers, connected with a digital optical TOSLINK cable. My problem is that I can't set my speakers up for surround sound. In Audio MIDI Setup, I can only select Stereo, and not the 5.1 option. In System Preferences I've selected "Digital Out - Optical digital-out port". That's all fine. Music plays fine through the speakers. In Audio MIDI Setup, the only choices I have in the Default Output and System Output drop down boxes are "Built-in Audio". Under that, in the Audio Output area, for the Source I have "Digital Out" selected. Clicking on Configure Speakers, I have it set to Multichannel, but it only allows me to select Stereo from the drop-down box. Any help is appreciated!!