The difference is that the bore size of the baritone horn is typically smaller than that of the euphonium, and the baritone has a primarily cylindrical bore, whereas the euphonium has a predominantly conical bore. It is extremely similar to a baritone horn. The euphonium is in the family of brass instruments, more particularly low-brass instruments with many relatives. In British brass bands, it is typically treated as a treble-clef instrument, while in American band music, parts may be written in either treble clef or bass clef, or both.Ī person who plays the euphonium is known as a euphoniumist, a euphonist, a euphophonist or simply a euphonium player. Nearly all current models have piston valves, though some models with rotary valves do exist.Įuphonium music may be notated in the bass clef as a non- transposing instrument or in the treble clef as a transposing instrument in B ♭. The euphonium is a medium-sized, 3 or 4-valve, often compensating, conical-bore, tenor-voiced brass instrument that derives its name from the Ancient Greek word εὔφωνος euphōnos, meaning 'well-sounding' or 'sweet-voiced' ( εὖ eu means 'well' or 'good' and φωνή phōnē means 'sound', hence 'of good sound').

E flat major scale euphonium