 Composer Yasunori Mitsuda was also asked to contribute, but he was busy scoring "Xenosaga".The expansion packs were scored by Mizuta alone after Tanioka left to pursue other projects and Uematsu left Square Enix, although their names remain in the credits for those albums due to the inclusion of versions of songs they had previously composed for the game.The opening of the game features choral music with lyrics in Esperanto.