To her audience, Janis Joplin has remained a symbol, artifact and reminder of late Sixties youth culture. Her popularity never derived from her musical ability, but from her capacity to link her fantasies of freedom and immortality with ours.

Elton John can be a master of the sleight of hand. The arrangements make it seem like there are substantial melodies underneath the tracks - but almost nothing demands repeated listenings. Similarly, he always sounds like he's singing up a storm, but his voice glosses over the material, reducing most things to an uninteresting sameness.

Soul was the music made by and for black people. For most of the Sixties it was thoroughly divorced from white popular music, but by the end of the decade several artists with their roots firmly in both soul and R&B traditions had crossed over.

There is absolutely no doubt that the extraordinary Donna Summer belongs in the Rock and Roll Hall of Fame.

Part of me believes that the completed record is the final measure of a pop musician's accomplishment, just as the completed film is the final measure of a film artist's accomplishments.

Sly Stone doesn't make good albums: only good records. His style is so infinite and revolves around so many crucial aspects that it has only come together perfectly on a handful of his singles.

One gets the impression that Elvis Presley does what his business advisors think will be most profitable. My advice to them: Put Elvis Presley in the studio with a bunch of good, contemporary rockers, lock the studio up, and tell him he can't come out until he's done made an album that rocks from beginning to end.