History: What does a digital converter do?

What does a digital converter do?

• Emits sound from a musical instrument or device.
  The sound source emits sound.
• Receives changes in amplitude from the diaphragm in the microphone, quantifies it, and converts it into a digital format.
  Correct!
• Moves with changes in air pressure, and the energy represents the sound
  The diaphragm moves with changes in air pressure.
• Changes the array of integers back into an analog signal.
  Usually, the computer will handle this job with its sound card.