@Doodlin said in Valve combination 1 and 3:
I think it's only for D and G below the staff. As a beginner , this particular combo seems to require a different airstream or attack. I am I alone on this?
Officially, I would say that is correct, however the 1&3 combination can be used and held down he entire time for playing D G B G arpeggios and bugle type calls so you don’t have to move to different fingerings, but I know the intonation would be affected. I use that combination for the D on the 4th line with my C trumpet sometimes for better intonation. So you see, there are some exceptions.