One of the three albums that accompanied the release of Ar tonelico: Melody of Elemia. This album was the first soundtrack produced by Gust in using stream technology to store and play the music within the game, and according to commentary, it's a departure in comparison to the previous works of the composers. Contains all of the instrumental BGMs used in the game, but lacks all of the Hymmnos songs, except for the game's opening and ending themes, and the bonus BGMs that were borrowed from Atelier Marie and Atelier Elie.