in 1980, japanese company roland released the tr-808, an analog rhythm/drum machine, which has unique artificial sounds, such as its booming bass and sharp snare, and a metronome-like rhythm. yellow magic orchestra's use of the instrument in 1980 influenced hip hop pioneer afrika bambaataa, after which the tr-808 would be widely adopted by hip hop djs, with 808 sounds remaining central to hip hop music ever since. the roland tb-303, a bass synthesizer released in 1981, had a similar impact on electronic dance music genres such as techno and house music, along with roland's tr-808 and tr-909 drum machines.