Answer by
Alayean (102)
Near as I can tell, there are 9 different possible trumpet fingerings. They consist of Open valve, valve 1 only, valve 2 only, valves 1 and 2, valves 1 and 3, valves 2 and 3, and valves 1, 2, and 3. It is possible to use the third valve by itself, but it tends to produce a flatter note.