For many years, the single bit of advice all experienced podcasters gave to novice podcasters was, “Get Levelator”. Levelator was a free piece of software that would take an audio file with unbalanced audio levels, chew on it for a moment, and then spit out an audio file with balanced audio. Uneven levels are particularly a problem when multiple people are recording, but can even be an issue when recording yourself (or yourself and some other audio source, like system audio).
Well, our beloved Levelator suffered from lack of attention and then abandonment. So you can imagine my surprise when I found out that Levelator Lives again, this time in the Mac App Store. If you ever have need to work with audio files (or *think* you may need to), “get Levelator”.