Spectrasonics - Omnisphere v1.5.6 WIN & MAC

This epic ‘Power Synth’ breaks sonic ground by combining a wide variety of hybrid realtime synthesis techniques, an epic library of remarkable ‘Psychoacoustic’ sounds, and many innovative features that have never been seen before in any hardware or software synthesizer.

Powerfully simple interface design makes key features accessible to every user
Advanced users can "zoom" into deeper and deeper synthesis capabilities
Sophisticated Browser with searching, sound attributes, descriptions and images
8 independent Arpeggiators
World's first Arpeggiator with Groove Lock™ - which allows the Arpeggiators to match the feel of Stylus RMX and MIDI Files.
Special performance-oriented Live Mode interface allows for seamless, interactive creative patch switching and layering on the fly
Stack Mode interface allows for complex patch layering, splits, and crossfades (velocity/positional/controller)
8-part multitimbral with built-in Mixer, Aux FX and Mastering FX racks
Advanced MIDI Learn and Automation parameter handling