Marty,
I remember going to an industry trade show in New Orleans at the end of the 80s, and was surprised they were still playing. I then realized the members were not the same as the original Dukes.
The 12 lps I have are al mono , recorded on Audio Fidelity in the late 50s. AT that time the members wereFrank Assunto- trumpet, Fred Assunto-trombone, Jac Assunto-trombone and banjo,Harold Cooper-clarinet,Stan Mendelson-piano, Jon Edwsards- drums,, and Bill Porter on tuba and string bass.
I need to dig out the rest of the set, as I remember they all sounded great. Audio Fidelity always pumped up the sound as if bass and treble controls were always on.
Ken