I'm totally ignorant about jazz, and have never heard any of the recordings of Mr. Shepp and Mr. Rudd. But to call a black ( he calls himself negro) jazz musician's saxophone playing "phlegmatic" and "winded" sounds insulting. The root word of "phlegmatic" may mean "burn", but "phlegmatic" itself means cold and clammy.
And to say his trombonist, Mr. Rudd, was "hectoring" him also insulting. Surely a more appropriate quotation could have been chosen.