Crush 40 is a Japanese-American hard rock band. The group consists of guitarist and composer Jun Senoue and vocalist Johnny Gioeli. Crush 40 is best known for their contributions to the Sonic the Hedgehog video game series. Senoue has been employed by Sega as a composer since 1993. While preparing music for Sonic Adventure, he contacted Gioeli to perform the game's theme song, "Open Your Heart". They also recorded the soundtrack for NASCAR Arcade under the name "Sons of Angels", which was released in Japan as the album Thrill of the Feel (2000). Afterward, Senoue and Gioeli continued recording music for further Sonic titles, as well as their own original songs.