The baritone is a low brass instrument that plays the same notes as the trombone but looks like the tuba's smaller cousin. Its mouthpiece is the same size as the trombone's, but it produces a warmer sound due to its larger bell. Whereas notes on a trombone are changed by moving the slide, notes on a baritone are changed by pressing down valves. Baritone (also sometimes referred to as euphonium) is a very important instrument in the band. Check out the examples below!
Listen to how beautiful this instrument sounds! The fingers really get flying on this one!