While the catalogues of Motown and Stax get all the attention, the "Philadelphia sound" of the '70s - headquartered at Kenny Gamble and Leon Huff's Philadelphia International Records - if often overlooked, and that's a pity. This concert, filmed last year for a PBS fundraiser and in conjunction with the release of the 4-CD box set of the same name, showcases many of the PI stars revisiting their classics. Producers were also blessed with an extremely appreciative crowd, and the shots of
