Description: The Euphonium is a baritone-voiced brass instrument that derives its name from the Greek word EUPHONUS meaning "well-sounding" or "sweet-voiced" (eu means "good" and phonos means "of sound", hence "of good sound"). The euphonium is a valved instrument; nearly all current models are piston valved, though rotary valved models do exist. The euphonium is a non-transposing instrument known for its distinctive tone color, wide range, variety of character and agility.