Atlantic's Jerry Wexler believes first-rate records are made by first-rate voices. He certainly has worked with enough of them: Clyde McPhatter, Joe Turner, La Vern Baker, Ray Charles, Otis Redding, Solomon Burke, Wilson Pickett and Aretha Franklin.

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.

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.

It is by now beyond question that Elton John is a competent and classy entertainer. Few people who have achieved his popularity have succeeded in maintaining his standards for performance and professionalism.

The Beatles never sounded intimidated by their idols. They never interpreted old rock; they simply played it as well and as joyfully as they knew how. On 'Rock 'n' Roll,' John Lennon does nothing but interpret old rock.

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.

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.