Description:The cornet is virtually identical to the trumpet, except the cornet has a conical bore and the trumpet has a cylindrical bore. This creates a subtle difference in the harmonic structure between the two instruments, but their sound production, tuning, and valve configuration are the same.
The cornet can be used to show the geometry and function of the valves, how they are tuned, and the notes produced by blowing the instrument with various valves pressed.