Buddy Bolden on the Brink of Madness

No one knows the story for sure, but let’s proceed with this version: 
In the spring of 1898, a procession of musicians strode down a New Orleans city street swaying their trumpets to a tune. Blocks away, a young cornet player tapped his horn against the curb, put it to his lips and began to blow so loud and so powerfully that the parade stopped. Spellbound, it detoured toward his sound.