 In any case, they have become rare (they were last in Conn's advertisements in the 1940s, and King's catalog in the 1960s), and are generally unknown to younger players.They are chiefly known now through their mention in the song "Seventy-Six Trombones" from the musical "The Music Man" by Meredith Willson.A marching version of the euphonium may be found in a marching band, though it is often replaced by its smaller, easier-to-carry cousin, the marching baritone (which has a similar bell and valve configuration to a trumpet).