Below are links to musical sketches, in reverse chronological order. I wrote these to sort-of get an idea how instruments interact, and what they do at different points of the register. For example, a trumpet playing in a higher register is going to have a completely different effect than one playing in the lower registers.
Also, asking a trumpet player to play softly in a higher register is going to be met with some raised left eyebrows and twitching upper lips. This brings up what we can do in a DAW / music notation software versus reality: sure, you can dial down the trumpet playing a high C, but it’s not going to sound very realistic.
“Sometimes, the magic works, sometimes it doesn’t.” Chief Dan George, from the film Little Big Man