Baritone horn 细管上低音号
The baritone horn, or sometimes just called baritone, is a low-pitched brass instrument. It is a piston-valve brass instrument with a predominantly cylindrical bore like the trumpet and uses a wide-rimmed cup mouthpiece like that of its peers the trombone and euphonium. Like the trombone and the euphonium, the baritone can be considered either a transposing or non-transposing instrument.