1. Choose to open multiplayer battle, as shown in the picture below:

2. After opening, choose to start the game, as shown in the picture below:

3. Enter You can find music boxes in the game, as shown in the picture below:

4. There will be music boxes in different locations, as shown in the picture below:

5. After finding it, walk over and click Play music, as shown in the picture below:

6. After clicking play, you can open the music box, as shown in the picture below: