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.

Bob Dylan was the source of pop music's unpredictability in the Sixties. Never as big a record-seller as commonly imagined, his importance was first aesthetic and social, and then as an influence.

I saw my rock'n'roll past flash before my eyes. And I saw something else: I saw rock and roll future and its name is Bruce Springsteen. And on a night when I needed to feel young, he made me feel like I was hearing music for the very first time.

The Beatles production is often so 'perfect' that it sounds computerized. 'Sgt. Pepper' really does sound like it took four months to make.

Bob Dylan may be the Charlie Chaplin of rock n' roll. Both men are regarded as geniuses by their entire audience. Both were proclaimed revolutionaries for their early work and subjected to exhaustive attack when later works were thought to be inferior. Both developed their art without so much as a nodding glance toward their peers.

Everyone eventually winds up writing about themselves - the problem is finding the best way to go about it. To write about oneself literally, in the first person, presumes a more interesting personal life and philosophy than most rock lyricists possess. John Lennon was good for one great album based on musical direct address, 'Plastic Ono Band.

The early Stones were adolescent rockers. They were self-conscious in an obvious and unpretentious way. And they were committed to a musical style that needed no justification because it came so naturally to them. As they grew musically the mere repetition of old rock and blues tunes became increasingly less satisfying.