Pianist, composer, ensemble leader, now autobiographer — at age 84, Randy Weston is a huge and undiminished presence. Read my column in City Arts New York about how he’s just published African Rhythms, his life story, is signing it at Tribecca Performing Arts Center (NYC) Oct. 30, and leads his 22-piece orchestra at that same venue in a 50th anniversary concert of his 4-part suite Uhuru Afrika, (lyrics by Langston Hughes) on November 13.