Tutorial/A Mysterious Bookshelf Full of Grimoires?

You will sometimes find special bookshelves used to store grimoires within the castle.
Place the grimoires you find within the castle back onto the shelves to activate the musical power within.

Use the power of the "symphony" to resonate with activated bookshelves. Hold to unleash a Play Soundwave that will cause the grimoires to fly off the shelves, and Press to unleash a Pause Soundwave that will stop them in mid-air.
If you can stop the grimoires in just the right positions, perhaps you can open the routes hidden behind the bookshelves...