It seems this has been a very requested feature. Will you update Camtasia so that it can be used with external audio interfaces? Nice program, but this lacking feature makes it a really sub-par performer. Even Quicktime can screen record and recognize any audio interface I have connected. I have several audio interface options, from PCI audio cards, Firewire audio interface, USB audio interface. None of them can be setup as both the input and output. Actually, none can even be the input only. With all the DAW and Video software products on the market, the lack of this feature is a real drawback to what is otherwise a very nice program. I'm noticing on the forums that this request has been common for more than a few years.