Listen to Wikipedia: Wikipedia gets edited a lot. Here’s what that sounds like:Bells indicate additions and string plucks indicate subtractions. Pitch changes according to the size of the edit; the larger the edit,the deeper the note. Green circles expose edits from unregistered contributors, and purple circles mark edits performed by automated bots. You may see announcements for novel users as they join the site, and punctuated by a string swell.[via Kottke.org]
Source: jasonweinberger.com