The Bb trumpet is a brass instrument commonly used in various music genres, including classical, jazz, and marching bands. It is pitched in the key of B flat, meaning that when a player plays a written C, the sound produced is a Bb. This instrument typically has three valves that allow musicians to change the pitch by altering the length of the tubing. Bb trumpets are known for their bright, powerful sound and are often favored by beginners due to their relatively easy playability. They are part of the brass family and are frequently used in ensembles alongside other instruments like the trombone and French horn.