Techno is a genre of electronic dance music that is characterized by a repetitive four on the floor beat, synthesized basslines, and a variety of electronic effects. The genre emerged in Detroit, Michigan in the 1980s and became popular in the 1990s. Techno is often associated with the underground club and rave scenes, and its sound is often described as dark and futuristic. Popular subgenres of techno include minimal techno, Detroit techno, and tech house. The genre has also been used in many other forms of media, such as video game soundtracks and film scores.