Spectrasonics Stylus RMX Xpanded Realtime Groove Module Virtual Instrument Software First product using new S.A.G.E. technology (Spectrasonics Advanced Groove Engine) Realtime auto-sync to the beat so grooves are always in time, even when performed live Groove Control is always active for optimum sound quality at virtually any tempo Massive, cutting-edge 7.4GB core library, with nearly triple the sounds of the original Stylus (the original Stylus core library also included) Includes "S.A.G.E. Xpanders": Backbeat: Live Acoustic "straight-ahead" drum grooves Retro Funk: Authentic