British pianist, composer, and bandleader Keith Tippett's career spanned jazz-rock, progressive rock, improvised and contemporary music, as well as modern jazz for more than half-a-century. From solo performances through numerous duos, trios, quartets, quintets, sextets, and septets to the 21-piece orchestra the Ark and the 50-musician-strong Centipede, Tippett held an unparalleled place in British contemporary music. He played the piano on records by King Crimson, Peter Sinfield, Elton Dean, and various offshoots from the Canterbury orbit. His own recordings, including 1970's...