Hey thanks for all your help, I've had a look and I think I'll go the whole hog and get an 8in/8out firewire audio interface by Edirol (Roland). The FA-101 is very good value. It's only for OS 10.3.3 so no swapping back to 9! It uses the OS X core audio drivers. I hope I can pipe my itunes and system sounds etc through it! Hopefull when I install my Powerlogix upgrade I shouldn't need to go back to 9! I thought that it might be best to get a multi-input thing rather than spending the odd bit of cash going for a small usb thing. I have heard the m-audio stuff it rock solid - I've got one of their USB-MIDI boxes and it's great! Alex