Nice choice, the soprano cornet is the smallest and highest pitched brass band instrument.
Interesting Soprano cornet facts
The soprano cornet is very similar to the standard cornet, but it is pitched a forth higher.
A single soprano cornet is usually seen in brass bands and can often be found playing lead or descant parts in ensembles.
Just like the cornet it is a conical bore instrument. This means that the diameter of it’s tubing gradually increases throughout the length of the tubing.