In my ongoing efforts of being a student of the Audio Engineering experience, I frequently find myself tweaking different areas of my gain structure. One aspect in particular has me a bit confused, so any advice or enlightenment that someone can throw my way would be greatly appreciated. First, a little background: The components of my signal chain are very straight forward.. Source (guitar/vox/bass)>Mic (where applicable)>Preamp>Audio Interface (RME FF800)>DAW (Logic). I usually start by working from the SOURCE to the DAW and then adjust or experiment accordingly once I have things in order. How loud is my amp going to be, am I singing soft or loud, how much 'color' do I want from the preamp, etc...the basic stuff. My main question lies with my RME800. I typically leave the input levels (faders in Total Mix) pulled all the way DOWN on the FF and just work with my input/output levels on my preamps and in Logic. If I raise the input in the RME I can hear an audible difference when monitoring, but not so much once I record and playback. I guess I could sum it up by saying that adjusting the input level on my RME seems to do little or nothing with respect to whatever I may be recording. This leads me to wonder if I'm in fact doing something wrong, or maybe even have things setup incorrectly. It's not to say that I haven't been able to get some really nice tracks recorded (I'm not complaining)...I just want to be certain that I understand better the 'what's and why's' about my signal chain better than I do. Thank you in advanced.