Edward Kennedy -Duke- Ellington (April 29; 1899 May 24; 1974) was an American composer; pianist; and bandleader. Recognized during his life as one of the most influential figures in jazz; if not in all American music; Ellington-s reputation has increased since his death; including a special award citation from the Pulitzer Prize Board.One of the twentieth century-s best-known African-American celebrities; Ellington recorded for many American record companies; and appeared in several films. Ellington and his orchestra toured the United States and Europe regularly before and after World War II. Ellington led his band from 1923 until his death in 1974. His son Mercer Ellington took over the band until his death from cancer in 1996. "In a Mellow Tone", also known as "In a Mellotone", is a 1939 jazz standard composed by Duke Ellington, with lyrics written by Milt Gabler.[1] The song was based on the 1917 standard "Rose Room" by Art Hickman and Harry Williams.[2]Edward Kennedy -Duke- Ellington (April 29; 1899 May 24; 1974) was an American composer; pianist; and bandleader. Recognized during his life as one of the most influential figures in jazz; if not in.