A few years ago I was talking to an older gentleman who played trumpet with the big bands. He also said that you had to be able to "double tongue" to be even considered for an audition if you were lucky enough to get one to play with some of the great bands like Dorsey, Miller, Shaw, James, etc, etc, ....not to mention the physical instrument choreography involved which you had to know while playing with your particular section. like in this video at around 1:16
http://www.youtube.com/watch?v=qIuveaFWA...from=PL&index=6

Watching a good horn player perform is a real treat for sure.WHAT THE HECK HAPPENED TO "real band music " PLAYING!!!