Jun Senoue and Kenichi Tokoi on Sonic Adventure Original Sound Track:
Zero the Chase-master …Boss: Eggman Robot -Zero-
Senoue: Come to think of it now, when I made the boss battles intensively, I might have done it at a strange pace…. This is also variously incorporated in Eggman’s theme song in the motive and the radiolike part in the middle. It’s quite a strange guitar and good feeling, isn’t it?
Tokoi: Am I the only one who ends up imagining the timbre of the clavinet style as electromagnetic waves in the forthcoming boss battle of Amy? It fit Zero’s image exactly.