PSP FETpressor is a FET feedback type compressor plug-in. It’s designed to provide accurate, almost instant compression with lots of character. Great for vocals, guitars, bass, drums, and whenever a classic 1970s-style FET compressor is needed. PSP FETpressor contains everything you’d expect from a FET compressor: an internal side chain high pass filter to control amount of low frequency pumping, smoothly adjustable compression ratio, ability to select which channel to process, and a link switch. This compressor also contains a dry signal blend for parallel compression. Additionally PSP FETpressor contains makeup amplifier and output transformer emulations to add subtle character even when set to 1:1 ratio.Requirements:PCVST3• Windows x32 or x64 (7, 8 or 10)• VST3 compatible applicationVST• Windows x32 or x64 (XP Service Pack 2, Vista, 7, 8 or 10)• VST 2.4 compatible applicationRTAS• Windows x32 or x64 (XP Service Pack 2, Vista or 7)• ProTools LE 8.0.0 or ProTools TDM 8.0.0 (or later)AAX• Windows x32 or x64 (XP Service Pack 2, Vista or 7 or 8 or 10)• Pro Tools 10 or Pro Tools 11 or Pro Tools 12 (or later)Mac (intel)AudioUnit• Mac OSX 10.6 - 10.11 or later• 32 or 64-bit host application capable of running AudioUnit plug-ins with Cocoa viewVST• Mac OSX 10.6 - 10.11 or later• 32 or 64-bit VST 2.4 compatible host applicationVST3• Mac OSX 10.6 - 10.11 or later• 32 or 64-bit VST 2.4 compatible host applicationRTAS• Mac OSX 10.6 - 10.11 or later• ProTools LE 8.0.0 or ProTools TDM 8.0.0 (or later)AAX• Mac OSX 10.8 - 10.11 or later• Pro Tools 11,12 or later