Music over end credits of Ken Burns' Jazz??
 

This is bugging the heck out of me because I love the tune. Can't find any info on what it's called. Seems to be Louis Armstrong playing horn with a very smooth, cool line. No vocal. It's the song that covers the credits on each of the episodes.

Anyone can help?

Found it. Louis Armstrong - Star Dust.

Fantastic song. Now I'm off to find it on disc as well as Ellington't Daybreak Express.