Belgian-American jazzer Toots Thielemans was an important bandleader and composer who played with countless jazz giants, but his mastery of the harmonica—previously thought of mostly as a folk instrument—was where his contributions were most unique. Tracks like “Waltz for Sonny” and “This Is All I Ask” see Toots offering up tactile, lush melodies that always seem to take the music somewhere it didn't expect to go.