From the about page [0]:<p>"Mashup Breakdown is an attempt to visually describe the musical wizardry that goes into a mashup. For each track, you'll see the timeline of samples used, and with the currently active samples highlighted in real time as the track plays. I (@brahn) created the site when the spectacular mega-mashup artist Girl Talk released his 5th album, All Day, composed from an astounding 372 songs by other artists."<p>[0] - <a href="http://blog.mashupbreakdown.com/pages/about" rel="nofollow">http://blog.mashupbreakdown.com/pages/about</a>