Access Virus TI2 Keyboard 61-key Analog Modeling Synthesizer New Effects, including Tape Delay, Frequency Shifter, new Distortions, and Character 25% more calculating power than Virus TI, and completely redesigned housing Dual DSP system with over 80 stereo voices under average load. (Load depends on which oscillator / filter model has been chosen) Virus Control 3.0 VST and Apple Audio Unit Plug-for Mac OS X and Windows XP. The remote seamlessly integrates the Virus TI into your sequencer, making it feel just like a plug-in Premium quality light-weighted keyboard with 61 keys, velocity response and aftertouch