A EUPHONIUM IS AN INSTRUMENT, OFTENTIMES CALLED A BARITONE. IN A MARCHING CONTEXT, BOTH ARE IDENTICAL. IN CONCERT, BARITONES ARE "CYLINDRICAL" MEANING THE DIAMETER OF THE HORN IS CONSISTENT THROUGH MOST OF THE HORN, PRODUCING A BRIGHTER SOUND. EUPHONIUMS ARE "CONICAL" MEANING THE HORN MORE CONSISTENTLY FLARES INTO THE BELL, CREATING A DARKER TONE. FOLLOW THE STREAM FOR TWO FUN FACTS WEEKLY THAT ARE NOT FDA APPROVED