Digi Mike (gotta address the right Mike lol)
I think it's great you're getting into this stuff. Between bit and Jeff, I even picked up a few things here. As you may or may not know, I usually stay away from the science oriented parts of audio. Anything that has to do with intense understanding just isn't for me. Some of it is a downfall for me I'm sure, but I'm sort of like that country Dr. that can pretty much do anything due to the experience of doing it without the scientific end. My dr's office is dirty, my tools are primative, I can't tell you the history of the bleeding patient but I'll stop you from dying and save your @ss every time. LOL!
That's been my approach to meters, the K system, RMS etc. I'm in the Herb camp on this. I look at a meter to record....I like to keep things at -6dB going in...I look at my meters while mixing and keep them out of the red with my master bus showing an LED peak of -3 dB and I export when I like what I hear.
When I master something....it's funny...by the time I get done doing my entire procedure by hand manually, my numbers end up right where they need to be without trying. I can master a song, look at the number read-out (min/max samples, RMS min/max/average etc) and tell you what the threshold the limiter I'm about to use will end up at before I add it. LOL!! I don't even need to listen to it after (yet I always do hahaha) I can just put it on and I know that my RMS levels on a final will end up at -10 to -7 max with an average of -11 to - 14 dB at all times...which is my opinion, is beautiful for rock/metal and pop.
But during a recording, I never think about this stuff for a second. As a matter of fact, I don't even think about it at the mastering stage. I master things until the sound good, but have a clue on what good and bad numbers will do to the sound. There are times when a client expects to hear a certain loudness...so I'll worry about stuff like that when asked, but most times I stay away from those types of jobs because I really want no parts of degrading music.
Anyway, the reason for my post here....like I said, it's great you're getting into this stuff and have the patience to learn. Just don't allow this stuff to dictate your decisions unless you see a series of numbers that set off an alarm that the audio may be degraded because of them. That's when you need to worry.
Also, keep in mind some programs may be inaccurate in how they read these numbers so make sure you have a few different sources to try. For example, I use Wave Lab 6 here....and the analysis is a little extreme where if I use other editors that do the same thing, the RMS numbers look way different. Wave Lab always seems to make things more extreme than they really are. It will show me a -4 RMS reading as a max value where Studio 1, Adobe, Sound Forge and others will show me -7 or -8 dB max RMS.
To me, Wave Lab would be the more trusted source here coming out of the gate....but then I learned that some of the read-outs as well as the meters are a little goofy in that version. So make sure you get a few different takes and try not to make too many decisions based on any type of number or graph read-out. The information is always an absolute plus to have under your belt, but nothing tops what your ears tell you...and I know you know that already. :)
-Danny