I wrote “Black and Tan Fantasy” in a taxi coming down through Central Park on my way to a recording studio. I wrote “Mood Indigo” in 15 minutes. I wrote “Solitude” in 20 minutes in Chicago, standing up against a glass enclosure, waiting for another band to finish recording. But when I wrote “Sophisticated Lady” it took me 30 days, because I couldn’t decide which way I wanted to go in the 17
th bar.
Duke Ellington