Multi-stage EQ plug-inPSP E27 is a multistage equalizer plug-in (VST3, VST, AAX, and RTAS for Windows; AudioUnit, VST3, VST, AAX, and RTAS for Mac OSX) modeled after the analog equalizer E27 produced by Avedis Audio Electronics. E27 offers three-band equalization with nine selectable frequencies in a standard 500x package. This equalizer offers +/-16dB of boost/cut at musically selected frequency ranges and offers gentle saturation. Low and high filters can work in bell or shelf mode with a single click. E27 is suitable for both mixing and mastering. PSP E27 offers an additional preamp stage for global level control. This EQ plug-in catches the nonlinear behavior of analog devices.Features:• Software plug-in modeled after the Avedis™ E27• Oversampled for smoother analog type high frequencies• 3-bands with 9 frequencies per band with x2 for additional bands• ±16 dB of boost and cut• Shelving option for low and high frequencies• PA11 pre-amp stage for global output level control• Selectable high-pass filter• DRIVE feature increases input while simultaneously decreases output• Suitable for tracking, mixing, and masteringRequirements: 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