Long, long ago... In a world not to different from your own...
I, too, was in high school marching band. I wanted badly to be a music major. I learned most instruments, my best ones being the French Horn, Trumpet, and my personal favorite, the Bari Sax for Jazz. Instruments I failed to pick up well were the trombone and flute.
One time, for a field show, I got the whole bass section to do a kick line for "Build Me Up Buttercup". We got in a little trouble for that one, since it wasn't part of the show. I was the naughtiest Band Prez ever (I know, nerd, right?)