Eternity ~Memory of Lightwaves~ Music From Final Fantasy X-2 Catalog # Composers Arrangers Producers Publisher CD Info Length Release date Eternity ~Memories of Waves and Light~ Music From Final Fantasy X-2 is a small promotional single of themes from Final Fantasy X-2. While the tracks share the same names as the ones on the OST, they are arranged differently. For example, the first track on this album used live instruments (piano, guitar, and bass) going along with the standard background music, whereas the game version uses more synthesizers.