The euphonium is a brass instrument known for its rich, warm tone. It typically has a conical shape and is played using a mouthpiece, similar to that of a trombone or tuba. The instrument has valves that allow players to change pitches, making it versatile for various musical styles, including classical and marching band music. Euphoniums are commonly found in concert bands and brass bands, where they often play melodic lines or harmonies. The instrument is sometimes referred to as a "baritone horn," although there are differences in design and sound. Its unique sound contributes to the overall texture of ensemble performances.