HomeRockHow Steely Dan Composes a Song: “Deacon Blues” Carl May 4, 2016 Rock, Slider This is a tremendous deconstruction of Steely Dan’s “Deacon Blues” by a guy who calls himself Nerdwriter. He looks at several elements: A strange chord the band used in the song and others, the instrumentation, the recording process, choosing the backup players and the lyrics. By the way, the chord is called the Mu major and, of course, was borrowed from the 12th century composer Perotin, who used it in “Viderunt Omnes.” We all knew that, of course. The video is well extremely well done and well worth a listen. Check out Nerdwriter’s Patreon page. I had the opportunity to chat with Steely Dan’s Jon Herington in 2014.