Alex, the very first thing that impressed me about Clarence Shaw's record was the cover; a picture of urban decay; that means he has consideration for those at the bottom.
I can't quite explain it, but there is something about the music that sounds like Chicago; it's hip, classic jazz, that rings of the South Side. (that was when there was only one "South Side", and that was the South Side of Chicago, even Al Capone was headquartered on the South Side in much earlier times)
This music was made for settling back into your favorite chair, and just letting the music absorb you. That trumpet is so smooth and unpretentious, while the accompanying musicians blend in perfectly; I hope this album is still available.