There's plenty of music which it makes sense not to find on Spotify - your college friends' band's self-release album from 1997, major acts like Led Zeppelin and the Beatles, etc. But, although Spotify is surprisingly complete, every once in a while I stumble on a gap that surprises me. Below are some of those. ~ Gillian Welch

~ Bobby

~ Anything on Drag City (apparently), including: "Bonnie" Prince Billy (or any other Will Oldham albums) Smog (or any other Bill Callahan albums) Shellac

~ De La Soul (!)

~ Tool