Manny Klein played the trumpet in movie (bugles are Key of G, trumpet is B^♭)

Apart from the many *merits of the book, movie: this may be the finest Taps in a movie (seen by moi.)
(My ~30 sec. in a Columbia movie no/count; takes longer..) {sigh}
Anyway, everyone has heard Taps n-times, but this illustrates that it can be expressive-music (when you ditch the bugle).
B^♭ is simply more brilliant; it helps to be a virtuoso/whatever horn, natch.

* Sinatra's Oscar, his only one was. as 'Maggio'.