Live recording is still one of the holdouts in the automatic audio world. There isn't one setting that will record everything, although there are laboratory amplifiers and digitizers that will do that, they don't produce an entertainment quality music file.
What happens when you set your recording for good headroom and just apply the compressors later? The limit in most performances is not high dynamic range, is the competing sounds like room noise, traffic noise, etc. Chris's Compressor does a very credible job of evening out loudness variations in a show.http://theaudacitytopodcast.com/chriss- ... -audacity/
Turns out podcasts don't go through a radio broadcast compressor and they're almost impossible to listen to in the field/jogging/walking, without constant juggling of the volume control on your iPod. A trip through Chris before you push the show to your iPod solves this.