How is pitch altered on a brass instrument?

Tuba.

For small intervals, there's usually a system of valves to alter the length of the resonating column of air and thus changing the pitch. For larger intervals, the player changes the shape of their...

tuba

trumpet

The resonant frequency produced by each pipe of a brass instrument or organ pipe depends on the speed of sound c divided by either 2 times the pipe length L (if it is open on both ends) or 4 times...