Last month we told you about "Ocean's Kingdom," the Paul-McCartney-scored-ballet set in an underwater kingdom at odds with the humans above (humans always ruin things). Today we've got a preview of the soundtrack, which is available for pre-order on McCartney's site. To get into the classical mood, Sir Paul apparently focused on "the purity of the ocean." So deep! Like 20,000 leagues. Listen to the clip below, and follow along with the nifty visualization.