A natural trumpet is a valveless trumpet, that's what they used for early trumpet parts, including things like the brandenburg concerto.
Nowadays, they're rarely used, only by groups that specialize in period instruments.
Out of the list given, bass flute would probably be the most useful.
Nowadays, they're rarely used, only by groups that specialize in period instruments.
Out of the list given, bass flute would probably be the most useful.