JRock, on 06 January 2012 - 16:03, said:
Coming form you Mr. mOOdawg I know it's constructive and I appreciate the candor
I'm grateful for well intentioned feedback from knowledgeable people. I definitely put it in my pipe and smoke on it a while ;)
I do need to practice my compression a little more. I am not that familiar with when, why and how to use it effectively, so I am hesitant. I burn through my songs so fast so as to get them done before I lose interest or get distracted that I don't get much opportunity to try this and try that. I need to set some time aside dedicated to practice.
It doesn't help that I don't have a DAW. I just sequence everything on my MPC and render it down to a stereo track.
A compressor is just decreasing the variance in volume, typically above a volume threshold. Ableton Live's compressor visually shows what's happening fairly well. I've attached a screeny of a compressor I used for vocals. No compression would have been a 45 degree line with volume being plotted on the line from left to right. So, where the line bends below 45 degrees is where you are starting to compress the volume. The effect is easy to see visually - the variances in volume are decreased which is done via gain reduction (the GR bar on the right of the graph will kick in so you can see how much reduction is taking place).
Since you are reducing gain over the compressed part, you have to often kick the gain back up to get the volume to where it needs to be. If you do it too much, you need to put a limiter on the end, which is just another gain reducer. It, however, prevents hard clipping so you can increase the volume a lot. This is one potential gotcha with destroying dynamic range because if you have to do this a lot, it means you're over-compressing most likely and removing clarity and richness from the audio.r source.
Hopefully that makes a bit of sense. Heck doing a quick video of the compressor in action may help explain it better but hopefully you get the idea.
It's very easy to do with a DAW, with the downside being that you can probably achieve better results in the analog domain over the digital one. The price you pay for convenience and cost

Most professional mastering studios likely use analog compressors, along side tons of expensive gear

That said, you can achieve some very good results in a DAW.
Not suggesting you drop what you're doing and go get a DAW though. The most important thing is, ultimately, the music, not the mix so if you're happy with your MPC, keep doing what you're doin' as clearly it seems to be working. If you do want to experiment around on the cheap, check out Reaper as it's a very nice and affordable (free, in most cases) conventional DAW.