[WolfeMacleod]

Want to try an interesting experiment?
Load the Audio clips from the article in seperate browser windows. It takes some timing, but you can start one, go to the next and start it, and go to thr third and start it. Each one should be set to start a few seconds after the previous.
It creates a very interesting spatial effect, even if perfectly synced.
MP3 compression, I believe, removes different bits of audio depending on the bitrate being used. Putting them together, it seems, replaces most of the lost bits. Or at least, it sounds that way.

If someone can't tell the difference, load the various clips into a multi-track Editor such as Cool Edit. You can switch between tracks instantly, and the diffeence it bitrates becomes immediately apparent. Layering tracks gives a fuller, richer sound. It's one of the methods that guitar players use to create amazing tracks. I don't think it's used much any more though...at least, current music doesn't sound like it.