I’m up for that. We could go back to another interesting paper linked above:
Ethan analyzes blues from the common practice harmonic perspective. But I like to analyze blues from the perspective of Indian classical music. I think of blues as the North American raga. Elements of a raga include:
- a pitch collection (scale)
- characteristic melodic motifs for navigating the pitch collection
- characteristic intonations for certain notes in the pitch collection
- characteristic lyrical motifs
- characteristic rhythms
- the general feeling or mood that the raga gives
The list doesn’t include harmony because ICM doesn’t use harmony. But we could add harmony to the list for the blues raga.
Indian musicians think of a raga as almost a living entity that emerges when you perform the raga. Something like the genie that manifests out of Alladdin’s lamp when you do the trick just right. For the blues, performing any two characteristic elements from that list the right way is sufficient to bring out the blues genie. You don’t need all of them.
Sometimes even one element is enough. For example, the theme song for The Sopranos begins with “Woke up this morning…”. That’s all it takes to raise expectations that the blues raga is about to emerge.
Harmony is the least important element of the blues raga, and only enters the picture decades after the blues is already a living raga. The first people to harmonize the 12-bar blues were urban professional musicians in the late teens/early 1920s. They were competent in multiple styles of music, and many were college educated.
They would have been competent in the vernacular harmony of ragtime, and the more sophisticated ones also would have known Debussy, Ravel, Bartok, etc. In other words, they already had models for modal and non-functional harmony, and models for harmonizing folk music. They used this raw material to build a blues vernacular harmony.
So here I think I disagree with Ethan than blues harmony is something new or inherently organic to the blues. It was borrowed from other pre-existing music and adapted. I also disagree that “blues tonality” or the blues scale is the primary factor that makes music a blues. I think any of the blues raga elements, rendered with sufficient conviction and blues authenticity, can bring the blues genie out of the bottle.