PHILADELPHIA (AP) — Philadelphia doesn't make it easy for music fans to explore the city's vast and rich musical legacy, but you can cobble together a do-it-yourself tour of the sights, sounds and neighborhoods that nurtured talent. Other places for inspiration: local news site Billy Penn puts out a Black Music Map every year in honor of Black History Month, and fans and experts offer tours through Jane's Walks, like this recent one exploring Ridge Avenue's jazz corridor. —SIGMA SOUND STUDIOS, 212 N.