The origin and development of this genre of electronic music, from its roots in Detroit and its later expansion into Germany. Key influences such as Kraftwerk and the Chicago house sound are explored, as well as the subgenres that emerged, such as acid techno , minimal techno and dub techno . The evolution of techno in relation to rave culture and the rise of illegal parties, "free parties" and "technival" is also described. Finally, music production practices are discussed, including the use of instruments such as the Roland TR-808 and Roland TR-909 , and the influence of digital technology on the creation of techno music.