Not much time today, but it appears O-10 is skipping over New Orleans, where jazz emerged around the turn of the 19th Century. I encourage any member here to read "Louis Armstrong's New Orleans" by Thomas Brothers. The book is well researched and, as the title suggests, is as much about the social fabric of N.O. (which differed from most American cities because it flourished as a non-US trade hub for so long) and the earliest roots of what became jazz as it is about Louis. There were distinct borders for Creole, white and darker-skinned Negro neighborhoods. Storyville, King Oliver, Buddy Bolden, Kid Ory (who moved to L.A. in 1919 at age 33... hmmm). Very informative and a good read.
According to Thomas, Louis recalled that, as a child (long before he learned to play himself), he was fascinated by a poor neighborhood "rags, bottles and bones" guy playing music like he had never heard on a cheap tin party bugle someone had thrown away. The music soon spread up the Mississippi River Valley and to the Northeast to many of the cities mentioned by O-10. And, yes, the influence of music from Baptist and Sanctified churches figured prominently.
According to Thomas, Louis recalled that, as a child (long before he learned to play himself), he was fascinated by a poor neighborhood "rags, bottles and bones" guy playing music like he had never heard on a cheap tin party bugle someone had thrown away. The music soon spread up the Mississippi River Valley and to the Northeast to many of the cities mentioned by O-10. And, yes, the influence of music from Baptist and Sanctified churches figured prominently.