For some reason, this came to mind as anesthesia was being applied to a tooth I was having pulled this morning:
One hallmark of an impressive cover tune is its ability for the singer to make it sound as though she wrote it. If it's from a genre that's outside of her usual range, it's all the more impressive. Such is the case with Dar Williams on her cover of Pink Floyd's "Comfortably Numb." If I hadn't known otherwise, I would have thought Williams wrote it. Williams sings and plays it, with backing vocals from Ani DiFranco, in her own effectively plaintive way. She stays faithful to the spirit of the song while putting her own stamp on it. I never hear her version played anywhere, but a station with an expansive AAA format should find space for it in its playlist.