Thanks Paul and Jace for these suggestions, references and your shared expertise. In orchestra we are playing Elgar's Pomp and Circumstance Military March No 1 and No 2 (original rep). Besides both of these pieces in their original form being a low brass blast, one phrase which comes to mind is in No 2 where there is an upward slur art a fast tempo that needs to be executed just right or else bad things will emanate.
It occurs before the first ending and or Coda and crosses this upstream downstream transition zone. For some strange reason more air always does the trick which I equate to Jace's approach of "moving forward."
Bob Tampa FL USA
Euph -- 1984 B&H Round Stamp Sovereign 967 / 1978 Besson NS 767 / Early 90s Sterling MP: 4AL and GW Carbonaria
Tuba -- 2014 Wisemann 900 CC / 2013 Mack 410 MP: Blokepiece Symphony American Shank and 33.2 #2 Rim