Sonic Footprint is a Chicago based four piece rock band formerly known as Critical Mass. Critical Mass was created following a recording project between former college friends and band mates David Callaway and Greg Popp. What began as a songwriting and recording experiment became an album of 11 original songs. Dave and Greg's desire to perform the album live resulted in their original college drummer Ron Low and Swamp Dog bassist Paul Jasper joining the band. Dave's fascination with cosmology, space, time, and the origin of the universe led the band to choose the name Critical Mass. Critical Mass performed songs from the album they subsequently named Baseline at Chicago clubs in 2004 and 2005. As soon as Critical Mass was formed, the band began working on new material for an album that would feature the playing of all 4 members. While working on the album, the band realized that Critical Mass might suggest religious-themed music and also learned that other organizations and bands already used the name. Therefore, Sonic Footprint was born. 12 new songs drawing from classic rock, folk rock, and modern rock elements were recorded in Greg's studio PoppArt and mastered with Justin Shturtz at the venerable mastering house Sterling Sound in New York City in June, 2008. In October of 2008, the self-titled album Sonic Footprint was released. Sonic Footprint plans to perform throughout Chicagoland in early 2009.