Here is Louis Armstrong’s first recorded solo, in 1923:
Here is Gunther Schuller, describing Louis Armstrong’s first recorded solo, in 1968:
[It] is a solo only in the sense that it takes place alone; it is not yet fully a solo in character and conception. It might easily have been one part of a collectively improvised chorus lifted from its background.
Here is Thomas Brothers, discussing Louis Armstrong’s first recorded solo and apparently expanding upon Schuller’s point, in 2014:
“Where’s that lead?” Armstrong heard [mentor and boss King Oliver] say…and that admonition was still ringing in his ears when he soloed on “Chimes Blues”…
Here is Bob Wilber’s Wildcats, playing Louis Armstrong’s first recorded solo, in 1947:
Here is the whole recording:
Things really pick up after that Armstrong homage, with the whole performance taking on newfound energy and cohesion. In other words, Armstrong’s “twenty-four bars of magic” work well as a lead. Yet Wilber, pianist Dick Wellstood and the other musicians knew that, didn’t they? We are fortunate to have a variety of thinkers from a variety of perspectives, and eras, sharing their insights. Yet that band did beat those scholars to this musicological punch!
(Incidentally, “magic” is an inspired description: an incredible thing that can be analyzed and perhaps even demystified, or something that we can explain even as it continues to stupefy us. Keep listening, and for goodness sake keep talking about what you hear.)