Sorry if this is in the wrong forum... I found the answer, see below. I just picked up an iSight FireWire Camera off Craigslist. Since my Mac Pro does not have a FireWire 400 port I picked up a Belkin FireWire 800/400 9-pin to 6-pin cable. When I plug the iSight into the rear FireWire 800 port iChat starts and the green light on top of the iSight camera is illuminated. I can see video clearly, but there is no audio. I check System Profiler and System Preferences and everything is listed and selected as they should be. Does anyone have any ideas why I would not be getting any audio?