One may be wondering what these are:
Well, you can use these to listen to music from the surgeries!

First of all, clear away some space to make it easy, then put the player in the empty space.
Next, press the button on the far right, like this:

Now, grab the music you want to listen to. In this example, I'll pick "Ambulance".
Put the disc into the player.

Click "Play" and enjoy!

You can also rewind and fast-forward, too. Hope you enjoyed this guide, if you liked it please rate it up!