After the success of the first generation of Proteus modules, E-mu began development of a new generation, using the 16-bit Emulator III technology. The Vintage Keys is a digital rack mount synthesizer that emulates the sounds of classic vintage synthesizers. It is also one of the first cool sound modules with good samples of vintage synth sounds. The Vintage Keys SoundFont collection has the typical brittle digital sound module sound qualities, but it makes nice pads, punchy bass and cool filter swept leads and works great for background synth sounds. Some of the users of these sounds have been Hardfloor, The Prodigy, Fatboy Slim, Meat Beat Manifesto, Goldie, Olive, Faithless, LTJ Bukem, Roni Size, Future Sound of London, Depeche Mode, Laurent Garnier, and The Shamen.