I see where you're comin from MP !
When I pull a past mix out of the shoebox and want to change how it sounds I'll rebalance it - either the EQ, dynamics or both. I call that re-balance, pre-mastering, finalizing or incorrectly mastering. For me mixing is already finished at that point - it's a rebalance. Many times I don't have the individual tracks.
If I want to throw a group of songs together on a new mix CD I'll rebalance the songs so they all fit together soundwise - I'd use any of the same names above although I'm actually rebalancing.
Har-Bal is actually designed to help maintain some consistency thru-out a project but it is a fact that there is very little consistency even between songs of similiar instrumentation and energy - like you said. In other words you can't push your song into the narrow curves of someone elses just like you can't push your songs curve into a flat pink noise curve.
You can however back up and look at the bass, mids, and highs and how a commercial recording slopes using a spectrum analyzer like Har-Bal, CurveEQ or Ozone2. There is no 1-button morph or EQ copy solution that sounds good - believe me I tried that Ha! Ha! And you can't look too closely at the curve of your reference material - but you can look at the broader slopes I mentioned and get an idea about how some of the greats (mastering & mixing engineers) balance their music.
Sometimes you may have a live-to-2track mix or a past mix where you can't remix and need to adjust a narrow band spike (imagine the singer forgetting to work the mic for a moment). That's where an RTA S.A. and a combination of EQ and narrow band limiting help a lot. Otherwise if I could I'd be more than glad to remix stuff if I had the tracks ! Now Har-Bal won't do that very well yet - that's a job for a realtime analyzer. I use CurveEQ and Ozone2.
So you gotta start somewhere - otherwise EQing is just a bunch of 1/6 band sliders to push up and down. Watching a real time spectrum and morphing and har-baling all help you learn so you can walk up to a mix and go - "I think I'll bump 14KHz to add some more air" like you did. Or know when to drop 300Hz a dB or so. Or peak the kick at 79Hz. All those analyzers and tools help you learn - along with balancing 100's of mixes or pre-masters !
But I hear what you're saying a lot of folks don't go in for Spectum Analyzers - they just listen. That's where I'm headed - but there's some space in between here and there. I imagine I'll be watching a RTA S.A. for a while though.
kylen
PS Bill - Paavo, the Har-Bal developer has himself noted that some of the stuff on the home page there is somewhat - 'hypey' shall we say. I think the purchase order I'd recommend is Voxengo CurveEQ and Ozone2 (or a S.A. with overlays and time decay), then Har-Bal if you're going to go the S.A. route. Otherwise I'd recommend great reference monitors, great reference amp, great room and acoustic treatments (I don't have that stuff !)
OK, what's next normalizing ?
just kiddin ! Some other time...