The baritone horn is a brass instrument that is commonly used in concert bands and brass bands. It has a rich, warm tone and is pitched in the key of B♭. The instrument features a conical bore, which contributes to its mellow sound, and is typically played with a mouthpiece similar to that of a trombone. Baritone horns are often confused with euphoniums, but they have distinct differences in shape and sound. They usually have a larger bell and a more straightforward tubing design. Players of the baritone horn are often referred to as baritone players, and they contribute to the harmony and melody in various musical ensembles.