Attached to my ppc macmini, I have a Creative Labs 24bit usb soundcard and Logitech speakers (I think they are x-530). The speaker system has front left, front right, center, left rear and right rear satellites and has a cable with three plugs on each end--one set plugging into the soundcard and the other into the subwoofer; these correspond to front left/right, center/subwoofr, left/right rear. It also has a piece attached to the subwoofer with the controls on it. There are also five jacks on the subwoofer for the five satellites. I have the system up and running and it sound pretty good but I'm not sure if I have it set up correctly in audio midi setup. For one thing, using voiceover since I am blind, following the channel setup in audio midi setup linearly from left to right doesn't make sense as it looks like there are in some places two popup menus fr one speaker test button or vice versa. I've decided that maybe the corresponding popup menu is actually found by arrowing down from the button label; I'm not sure if anybody can answer this from a visual point of view. But also I'm somewhat confused as to which channels I should be assigning. Is there a rule as to which channel numbers usually apply to the sic channels? while all my channnels appear to be working, clicking on the buttons in audio midi setup in some cases gives no response and in others gives response from more than one speaker. Can anybody tell me what matches I should try to make? -- Cheryl "Where your treasure is, there will your heart be also."