Photos: Listening in on Pandora

The Music Genome Project, founded by Tim Westergren in 2000, is the basis for Pandora's music engine. The goal of the project is to codify as many as 400 different attributes of a song, such as composition and bass line and rhythm, and then catalog that music and musician so people can find the "musical neighbors" of any song, whether it's Latin, jazz, country, rock or gospel.

Photo by Pandora.com