Under the Radar is looking back at one of our favorite episodes. Philadelphia International Records celebrates its 51st anniversary this year and the iconic "Phillysound" that it made famous. But the legacy of Philadelphia International Records is also its influence on other music genres and artists far beyond its birth city. We’re humming some of their biggest hits, and asking: What exactly is the sound of the City of Brotherly Love?


Max Ochester, musical historian and owner of record store Brewerytown Beats in Philadelphia.

Jack McCarthy, Philadelphia music archivist and historian.