History: What is sound reproduction?

What is sound reproduction?

• A process of combining two or more sounds.
  This is the definition of sound synthesis.
• A technique of taking an existing sound and outputting the sound in a new format.
  Correct!
• A method of breaking down a sound to compare and make decisions.
  This is the definition of sound analysis.
• A standard way of communicating between components.
  This is the definition of protocol.