Forgive my ignorance here but I'm working on a piece that requires two solo trumpets playing both in unison and seperate lines during the piece. The score doesn't specify which trumpets.
My question is: is there anything wrong with having a C trumpet play one part while a Bb trumpet play the other? the piece is a Pop music arrangment which, correct me if I'm wrong, usually uses the Bb trumpet but I only have one Bb trumpet. So why not use the Bb and the C to avoid having to use the transposition trick for the unison parts and for variety sake.
Would this be a good idea or would I be breaking the Hammurabi's Code of brass and trumpet arrangement😮