The background music for "Mega Man X6" was composed by Naoto Tanaka. The game also features the opening vocal songs "Moon Light" and "The Answer" by Showtaro Morikubo (the voice actor for X) and the ending theme "I.D.E.A" by RoST. This is one of the few X games to have the opening song appear in both the Japanese and English versions. All of the game's instrumental and vocal music was compiled on the "Capcom Music Generation: Rockman X1 ~ X6" soundtrack released by Suleputer in 2003.