DOL...
Attack and Release times aside, which is explained further below, the only difference between a compressor and a limiter is
the ratio(s).
I'm going to let SOS help me to explain it.
A
Limiter is intended to limit the maximum level,
normally to provide overload protection. This involves setting a threshold close to the maximum desired audio level, and using a very steep ratio (
anything above 10:1).
What this means is that the input signal has to go
10dB above the threshold before the output will rise
1dB above it. And in practice, that means that the signal doesn't exceed the limit threshold to any significant degree.
A
Compressor is used for less drastic, more creative dynamic control, and tends to use lower ratios;
typically 5:1 or less.
For example:
using a ratio of 2:1 means that for every 2dB of input level above the threshold, the output level only rises by 1dB, so the dynamic range above the threshold is halved.
The only other significant difference between a compressor and limiter is that a limiter tends to have much faster attack and release times, so that it can respond to brief transient peaks very efficiently, and without affecting the rest of the audio signal.
(
This is model dependent, though... for example, the Fairchild 670 has a lightning-fast attack time, but can be set to have release times as slow as 25 seconds... and no, that's not a typo... I really did say 25 seconds ).
Compressors tend to be set up with a slower attack specifically so that they don't squash the attack transient on percussive sounds. They also usually have a slower release so that their gain changes are more gentle; more like pushing a fader up and down.
As far as nomenclature, they are in fact,
all variations on the same thing... which is
Gain Reduction.
The term
'leveling amplifier' is really just another name for a
compressor. It was the popular name back in the '50s and '60s, and stems from the idea that a compressor is used to "level out" variations in volume.
You will often hear of models - like the LA2A - described as "leveling amplifiers", and it's not incorrect to describe it this way, because that's what it does.
But, it can
also act as a
Limiter as well,
depending on how you set it, how hard you drive it and to what extent you set the gain reduction.
Okay, onto the song...
First off, I
really like the song, it's kinda Allman Brothers meets Clapton meets The Band. I like it... a lot.
I won't comment on performances, just the mix.
Are you mixing through cans or speakers? If speakers, what kind are you using?
The lead vocal seems to have
quite a bit of low mids happening, making it "boomy" sounding. Off the top of my head, I'd say probably between 180 and 260... that's a guess, of course. I'm also hearing these low mids being accentuated by the
reverb you are using. This may be because of the
type of verb you've chosen, or, it could be that this particular verb has a lot of energy happening in that low mid region as an inherent part of the particular patch you are using.
Also, quite a bit of sibilance on the LV, too.
Backing vocals seem to share the same issues.
The snare sounds
far too compressed to me, it's
really squashed, and virtually disappears around the 1:00 mark (
"life goes on"). I understand you're not looking for a huge "Led Zeppelin drum sound" here, but you
can have a laid-back feel and performance
without having the listener have to struggle to hear the drums. Just because it's mellow doesn't mean that the drums shouldn't be present, and right now, they're really not... truthfully, they are all but non-existent in the mix.
This could be as the result of too much compression, or, it could be a simple volume level change is needed, although I
can hear quite a bit of compression on the snare (when I can hear the snare, that is).
I think you may need to walk away from this for more than just one day... I suspect that you're probably burnt out on it, and you need a fresh approach to the next mix. You might wan to put this away for
several days, and then re-approach it.
And, if this doesn't help, it
might come to the point where you have to consider letting someone else mix a version for you.
Believe me, you certainly wouldn't be the
first mixer to have to do that with a song.
Ask me how I know.
FWIW
d.