Beyoncé, dropped a surprise 14-track album with accompanying visuals for each track and her she is explaining the move. She released "Self Titled" Part I in which states:
I see music. It’s more than just what I hear. When I’m connected to something, I immediately see a visual or a series of images that are tied to a feeling or an emotion, a memory from my childhood, thoughts about life, my dreams or my fantasies. And they’re all connected to the music.
Watch it in the video below: