Mozart’s the Magic Flute is largely a metaphor pertaining to the Freemasonry and the enlightenment… augmented by fornication and flatulence jokes.
Traditional music is a general description of old songs, often transmitted orally, sometimes belonging to the public domain.
The song “Hail, Columbia” is one of several songs once considered an unofficial national anthem of the United States.
Stephen Sondheim can be considered “the father of the modern American musical”. Sondheim evolved the traditional American musical instead of adopting the more contemporary style of his peers.