Wikipedia : This day (December 26, 2011), in Orlando, Florida, died Sam Rivers, an American jazz musician – soprano and tenor saxophones, bass clarinet, flute, harmonica and piano – and composer .
Official Web Site : Thematic material, which he estimates; will take at least a decade to expand into compositions ranging from 5 to 50 minutes. Through habit and as a mental exercise, he composed at least a page a day through a speed process of 15 minutes to a half an hour.
@allmusic : His sound was hard and extraordinarily well-centered, his articulation sharp, and his command of the tenor saxophone complete. Rivers’ playing sometimes had an unremitting seriousness that could be extremely demanding, even off-putting.
@last.fm : Rivers brought the conceptual tools of bebop harmony to a new level in this process, united at all times with the ability to “tell a story” which Lester Young had laid down as a benchmark for the jazz improviser.