The tuba is a large brass musical instrument known for its deep, rich sound. It is the lowest-pitched instrument in the brass family and is often used in orchestras, concert bands, and brass ensembles. Players produce sound by buzzing their lips into a mouthpiece, and the tuba has several valves that help change the pitch of the notes. This instrument is essential in many types of music, including classical, jazz, and marching bands. Famous composers like Gustav Mahler and John Philip Sousa have written pieces that feature the tuba, showcasing its unique voice and versatility in various musical settings.