Jun Senoue, Kenichi Tokoi, and Fumie Kumatani on Sonic Adventure Original Sound Track:
Boss: Chaos ver. 0, 2, 4
Senoue: Actually, I was quite troubled with the battle music of Chaos and boss, and I made it without stopping after reaching the latter half. I looked for solution to the concept that united the boss battles which include Chaos, but in the end, I tried to decide on this sort of approach of big beat style. I intended to show the tension of suddenly encountering with a characterless fellow … though. By the way, which Chaos do you like?
Tokoi: Excuse me for interrupting. I like Chaos ver. 0 most.
Kumatani: Maybe Chaos ver. 0 for me as well….
Senoue: Is that because you can clear it right away?