Acid house is a subgenre of electronic dance music that emerged in the mid-1980s. It is characterized by its use of the Roland TB-303 bass synthesizer, which creates a distinctive squelching sound. The genre often features repetitive beats and psychedelic elements, making it popular in nightclubs and raves. The movement is closely associated with the Chicago music scene and was influential in the development of rave culture in the UK. Acid house parties often included vibrant visuals and a sense of community, contributing to its lasting impact on electronic music and culture.