This is an exciting week of class for me, because we are analyzing blues melodies, and that is a music-theoretic subject that is close to my heart. Given its impact on the past hundred years of Anglo-American popular culture, the blues has been the subject of a shockingly small amount of musicological analysis. The best …
Tag Archives: Robert Johnson
Identifying plagal cadences
This week in aural skills, we’re working on various harmonic tropes based on IV-I root movements. This chord progression is technically called the plagal cadence, but is more memorably nicknamed the “Amen” cadence because it’s a traditional European hymn ending. (It has nothing to do with the Amen break, though they do sound good together.) …
The twelve bar blues
This week in the Song Factory, we begin talking about the conventions of the blues. One central convention is the twelve-bar form. It’s so closely associated with the blues generally that jazz musicians use the term “a blues” to mean any tune using the twelve-bar form. However, it is surprisingly difficult to define what the …
Led Zeppelin and the folkloric integrity of the blues
There is a fascinating moment in “When The Levee Breaks” by Led Zeppelin where Robert Plant plays a very flat ninth on the harmonica. I love this note, because there is so much music theory and history encoded within it. Listen at 0:41. Before we can get into the details of this note and what …
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The three diminished chords: blues, jazz and classical
Diminished seventh chords are strange creatures: a cliche for Dracula’s castle, but also a cornerstone of the blues. They are also difficult to understand. The good news is that in any given key, there are only three possible diminished seventh chords: the one whose root is the tonic of the key, the one whose root …
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The blues and the harmonic series
In this post, I’m going to expand on an idea in my blues tonality treatise: that the distinctive scales and chords of the blues are an approximation of African-descended tuning systems based on the natural overtone series. Gerhard Kubik argues in his book Africa and the Blues that blues tonality comes from the overtone series …
Kind Hearted Woman Blues
So far, I have resisted writing about Robert Johnson on this blog. I love Robert Johnson, but it feels so corny to be yet another a white dude rhapsodizing about him. However, Robert Johnson is so sublimely great that he leaves me no choice. Robert Johnson’s life is famously not well documented, and his fans …
Blues tonality
See a more beginner-friendly blues primer here. Read this treatise in Spanish, translated by Jesús Fernández. Abstract The blues is a foundational element of America’s vernacular and art music. It is commonly described as a combination of African rhythms and European harmonies. This description is inaccurate. Blues follows harmonic conventions that are quite different from …
Diminished chords and the blues
The blues is a good entry path for beginner guitarists. If you learn the standard fifteen chords and the blues scale, you’ll be well on your way. However, there’s one crucial piece of additional music vocabulary you need to fully inhabit blues tonality, and that is the mysterious diminished seventh chord. To make a diminished …