Since the seasons started using CGI for action sequences and areas in [Red vs. Blue: Revelation], the official soundtracks for each season have been crafted by Jeff Williams, the former keyboardist of Trocadero, in addition to many of Trocadero's songs being reused. Williams's soundtracks have genres containing mixed elements of score music, hard rock, and sometimes electronic and rap. Williams often features others on vocals including Lamar Hall, Red Rapper, Barbara La Ronga, Nicole D'andrea, Casey Lee Williams, Sandy Lee Casey, and some members of the cast, and collaborates with Steve Goldshein on some tracks. The soundtracks also feature several parody songs, and some songs included are heard in PSAs and Rooster Teeth shorts.