Philadelphia International Records celebrates its 50th 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. As part of Under The Radar's ongoing summer series, we’re humming some of Philadelphia International’s biggest hits, and asking: Exactly what is the sound of Philadelphia?


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

Jack McCarthy, Philadelphia music archivist and historian.