Once among the most sought-after side men in the music industry, the extraordinary rhythm section of Sigma Sound Studios, in tandem with its innovative owner and engineer, Joe Tarsia, brought top producers from around the world to Philadelphia for a signature sound that can be heard on recordings by everyone from David Bowie to Wilson Pickett and Engelbert Humperdinck. Best known for their crucial contributions to the recordings on Kenny Gamble and Leon Huff’s Philadelphia International label, their driving rhythms and creative grooves dominated hits by the Intruders, the O’Jays, Harold Melvin & the Blue Notes, Teddy Pendergrass, Patti LaBelle and the Jones Girls, as well as soulfully symphonic classics produced by Thom Bell and recorded by the Delfonics and the Stylistics.

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