My guitar is plugged into a Vamp pro and I am using the spidif output into the saffire spdif input. I could have substituted "line input" for "spdif input" in my qeuery. To help clarify my problem, realband needs me to set the record input level. The only place I would have this ( as far as I know ) is the windows 7 record mixer, which again only shows my mic input on my saffire pro. My old computer with a creative audigy card did have it's own mixer applet. The saffire mix control software app. is for monitoring and routing only. The only gain control is on the saffire hardware and this is for mic & line inputs 1 & 2 only. I have been searching the web and found that it might be a driver issue.....Just got a second reply from focusrite....they have released a new driver. The blurb with it now says "fully compatible with new operating systems, win7 + mac. Funny, one of the faqs on there answer base, before the release of this driver, is about how the saffire works with win 7 64 bit. This is what I checked before I purchased the unit. I will try the new drivers this weekend. Thanks for your help. Will let you know....Bobby