CURTIS MAYFIELD. He's been called "the thinking man's soul man." He's known for his floating falsetto voice, gospel sound, and social commentary. He was with the group, "The Impressions" for 12 years recording such classics as "Gypsy Woman," "I'm so Proud," and "People Get Ready." After that he went solo. His score for "Superfly," was considered a musical breakthrough, and has inspired many of today's hip-hop performers. MAYFIELD was preparing for a comeback, with the release of "Return of Superfly," in 1990, when a freak stage accident left him paralyzed from the neck down. MAYFIELD's soundtrack for "Superfly" has just been re-released.Floating :30 I.D 12:35 and 12:45]Film critic JOHN POWERS reviews Stephen Speilberg's new film "Armistad."