As a pianist, composer, arranger, theorist and teacher, Ahmad Jamal's influence has echoed for well over five decades. His innovation as a composer has stretched the boundaries of music, and has influenced everyone from Miles Davis and John Coltrane to De La Soul and Jay-Z. At 80, he is still touring regularly, and his stop at Millennium Park will be a nice warm-up before this year’s Jazz Fest. The performance is free and highly recommended as it'll be a great way to wind down a summer of amazing performances at MP. (J. Min)