 Sotoyama worked with the sound effects programmer Masanobu Tsukamoto to modulate the frequency of the sound effects when objects moved in and out of the screen to simulate the Doppler effect.For "MUSHA"'s soundtrack, Nakashima originally presented an idea for what he called "Edo Metal" music to composer Toshiaki Sakoda.They eventually agreed on creating a speed metal soundtrack which would match the fast scrolling action of the game.