Art Pepper, who died in 1982 at the age of 56, was not only one of the great alto saxophonists of his era but a self-transformer to boot. In the early 1950s, he routinely ranked No. 2 in Downbeat polls (beat only by Charlie Parker), then vanished in the '60s (locked up in various prisons on drug charges), only to emerge in the mid-'70s with a totally different sound.
On his early albums, the best of which were recorded by…