DESC: Key Rig from M-Audio covers all the basic needs for today's keyboardist in a single virtual rack. Key Rig delivers four great sounding modules for stand-alone or plug-in useSP-1 Stage Piano, MS-2 Polyphonic Synthesizer, MB-3 Electromagnetic Organ, and GM-4 General MIDI Module. The master section lets you route, split, layer and mix these four powerful modules in whatever way best suits your performance and recording needs. A master effects section also allows for adding a common effect in addition to the individual effect section included with each instrument.