Sometimes when you enter the main house, you'll hear "eerie singing." You might think it's just to make things spooky, and it is, but it's also trying to send you a message.
That is, when you hear "eerie singing," it means someone has left you a message, an actual paper message, somewhere in the house.
Go upstairs and look on the table where you found the package from Savannah for your message.
I found a weird note!