Acid house is a subgenre of
house music developed around the mid-1980s by
DJs from
Chicago. The defining feature of a
"squelching" bass sound was produced using the
Roland TB-303 electronic synthesizer-sequencer. Acid house spread to the
United Kingdom and continental
Europe, where it was played by DJs in the acid house and later
rave scenes. By the late 1980s, acid house had moved into the British mainstream, where it had some influence on pop and dance styles.