"So what is The Levelator? It's software that runs on Windows or OS X (universal binary) that adjusts the audio levels within your podcast or other audio file for variations from one speaker to the next, for example. It's not a compressor, normalizer or limiter although it contains all three. It's much more than those tools, and it's much simpler to use. The UI is dirt-simple: Drag-and-drop any WAV or AIFF file onto The Leveler's application window, and a few moments later you'll find a new version which just sounds better."This looks like a cool little application that is free for non-commercial uses. I know I have some tracks that are highly varied on the volume such that I will crank it just to hear one and then get blasted when the next starts.