The Philly Sound documents the amazing and often neglected time period in Philadelphia music history from the 1960's to the early 1980's that influenced both pop music and American culture. From Chubby Checker to Lou Rawls, artists from all over the globe were drawn to Philadelphia’s Sigma Sound Studios in hope of capturing a new strand of sound coming from a startup studio founded by an unknown Philadelphia engineer. This would include the likes of The O’Jays, The Delfonics, Teddy Pendergrass, David Bowie, Elton John, Dusty Springfield, Stevie Wonder, Billy Joel and John Legend. In its most influential era, the music from Philadelphia laid the bridge for people from diverse backgrounds to work together to create an indelible era in music. Within the walls of Sigma Sound the only thing that mattered was if you could play and if you could, you were in. Produced and Directed by Sigma Sound alumnus, the access to the major artists, producers and engineers is unprecedented with filming taking place across the US and United Kingdom.