"Yggdra Union" has an extensive soundtrack, totaling nearly sixty tracks co-composed by Shigeki Hayashi and Minako Adachi. This near-half division of effort left Shigeki Hayashi mostly with character themes and promotional music, and Minako Adachi with the story, map and menu music. The soundtrack is an entirely original composition, except for the song , which is explained to be a bell-heavy arrangement of the "Riviera" song . Aside from the music, the audio in the GBA version of "Yggdra Union" is fairly standard, with sound effects in battle and beeping for text of a pitch based on the character speaking. There is no voice acting in the GBA version, but, despite that fact, one of the many fan demands since even before its release is a Drama CD.