PSP Nexcellence is a rich-sounding, spring emulation inspired by and modeled after “Necklace-type” reverb units. It provides two different spring set processors and can use one or both of its processing engines simultaneously. The algorithm has improved on the original hardware by providing a handy set of parameters to let you control inherent aspects of the spring reverb.Requirements:PCVST3• Windows x32 or x64 (7, 8 or 100)• VST3 compatible applicationVST• Windows x32 or x64 (Vista, 7, 8 or 10)• VST 2.4 compatible applicationRTAS• Windows x32 or x64 (XP Service Pack 2, Vista, 7 or 10)• ProTools 8.0.0 (or later)AAX• Windows x32 or x64 (XP Service Pack 2, Vista, 7 or 10)• Pro Tools 10, 11, 12 or Pro Tools HD 10, 11, 12All DAWs• Up to date iLok License Manager application installedMacAudioUnit• Mac OSX 10.8 - 10.12 or later• 32 or 64-bit compatible host applicationVST• Mac OSX 10.8 - 10.12 or later• 32 or 64-bit VST 2.4 compatible host applicationVST3• Mac OSX 10.8 - 10.12 or later• 32 or 64-bit VST 2.4 compatible host applicationRTAS• Mac OSX 10.8, 10.9, 10.10 or 10.11• ProTools LE 8.0.0 or ProTools TDM 8.0.0 (or later)AAX• Mac OSX 10.8 - 10.12 or later• Pro Tools 11, 12 or Pro Tools HD 11, 12All DAWs• Up to date iLok License Manager application installed