You have to buy a music player from the furniture shop in the commons. When you place it, a not will appear in the place furniture screen. At that point you can put the scrolls into the player and set them to play.
You have to buy a music player first. You can get it from the Wizard City furniture shopkeeper or the bazaar. Once you have the music player, put it down in your house and then click on it (while still in editing mode). A music note symbol should appear. Click on it and you will be able to add music scrolls to the player and choose which ones you want to play. Have fun! Saffron Sandsword Legendary