Trip hop is a sub-genre of electronic music that originated in the 1990s. While the term was originally used to refer to the work of American producer DJ Shadow, it eventually came to represent the sound coming from Bristolian artists like Massive Attack, Portishead, and Tricky. Trip hop shares its slow beats and moody sound with downtempo music, but often incorporates other elements, such as the use of samples and vocals borrowing stylistically from hip hop and contemporary R&B. This combination tends to create a dreamlike and eerie ambience.