From Trombone to Trumpet So I’m primarily a trombone player, and I’m in my high schools top jazz band. About 2 years ago I doubled on trumpet for the lower jazz band, and now my band director asked me if I could play for our jazz band’s preliminary competition, since some of our trumpets won’t be able to make it. I’ll be playing the 4th part, but there’s some notes in the semi-high register that I’m struggling with. Any tips to help me out on this doubling?