 Vocal artists featured in the game include Sawa Kato, Makiko Noda, Leah, Ayuko Tanaka, Mai Matsuda, Wakako, Hanaeryca, Cameron Strother, Andy Kinlay, Nulie Nurly, and Londell "Taz" Hicks.The developers used CRI Middleware's Kyuseishu Sound Streamer, a compression algorithm normally used for voice-overs, to compress the soundtrack and fit more songs on the game media, while replacing full motion video cutscenes with Flash-style animations to save more space.The ADX-compressed soundtrack and cutscene audio on the final version of the game take up approximately one-fourth (42 of 128 total MB) of the game media.