Law & Order 3: Justice is Served Hints

How do I open this box shaped like a piano?

  • 1 of 5: It's on a table in the living room, in case you can't find it.
  • 2 of 5: As you can probably guess, you need to play a specific nine-note tune to open the box. But what?
  • 3 of 5: There's something in this room that will play the tune for you.
  • 4 of 5: Or should I say someone who will sing it for you?
  • 5 of 5: See the parrot in the corner?