The team wanted "Sonic Adventure 2" audio to stand out, rather than merely serving as background music. Senoue felt that some of "Sonic Adventure" tracks were not as memorable as others. He and the Wave Master musicians made a pact with them "to write songs that promoted the game's speed and situations while keeping the best tempo of the stage". Senoue wrote each track before producing a demo version, and mixed them with a Yamaha digital console and Mackie analog mixer. He edited tracks using a Macintosh. After Sonic Team approved the music, Senoue finished sequencing it and sent it to the musicians for production.