Answer:
It lets you record what you hear. Whether it's pencil on printed manuscript paper, entering notes into Finale, or using the piano roll in Logic, being able to set down the notes you heard accurately empowers your music creation and manipulation.
I would go with 1920 because it is mentioned a lot in Wikipedia
Theatre or theater is a collaborative form of fine art that uses live performers, typically actors, to present the experience of a real or imagined event before a live audience in a specific place, often a stage.
