Called "one of the most fiercely independent and original groups of the Nineties", Stereolab were one of the first bands to be termed "post-rock". Their primary musical influence was 1970s krautrock, which they combined with lounge, 1960s pop, and experimental pop music. They were noted for their heavy use of vintage electronic keyboards, and their sound often overlays a repetitive "motorik" beat with female vocals sung in English or French.