I wasn't just talking about the song TSOP (which I've heard a Mummers string band play) but the Philly soul *scene*, going back to the sixties with the Soul Survivors, the Delfonics, Jerry Butler (whose career Gamble & Huff revitalized [I *looove* "Only the Strong Survive" and "What's the Use of Breaking Up"]), and some lesser knowns.
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