FabFilter Pro-C 2 is a high-quality compressor plug-in for the most demanding engineers. Whether you need subtle mastering compression, an upfront lead vocal, that magic drum glue or deep EDM pumping: Pro-C 2 gets the job done with style!

Key features

Eight different compression styles, of which five are new in version 2: Vocal, Mastering, Bus, Punch and PumpingNEW
Gorgeous Retina interface, with (optional) animated level knee displays and accurate peak/loudness meteringNEW
Side-chain EQ section, with customizable HP and LP filters, plus an additional freely adjustable filterNEW
Program-dependent attack and release curves
Smooth lookahead (up to 20 ms), which can be enabled/disabled to ensure zero latency processingNEW
Intelligent Auto Gain
Hold (up to 500 ms)NEW
Custom knee, variable from hard knee to a 72 dB soft knee (to enable saturation-like effects)NEW
Auto Release
Super-fast attack times
Up to 4x oversamplingNEW
Variable stereo linking and mid/side processing, with mid-only, side-only, M > S and S > M processing.
Audition Triggering option, which enables users to hear on which parts of the audio Pro-C 2 is triggering and how much compression is taking placeNEW
Multiple interface sizes: Small, Medium and LargeNEW

Range setting, which limits the maximum applied gain changeNEW
Mix setting, which scales the gain change from 0% to 200%NEW
Full Screen mode, offering a large level display and side-chain EQ controllerNEW
Accurate, large level and gain change meters, with peak and loudness level visualization. The loudness level complies with the Momentary mode of the EBU R128 / ITU-R 1770 standardsNEW
Retina support on OS X and High DPI support on WindowsNEW
External side chain triggering
GPU-powered graphics acceleration
Stereo and mono plug-ins available
Optional MIDI triggeringNEW
Supports common Pro Tools hardware control surfaces
MIDI Learn
Undo/redo and A/B comparison
Smart Parameter Interpolation
Sample-accurate automation of all parameters
Extensive help file with interactive help hints
Available in VST, VST3, Audio Units, AAX Native and AudioSuite formats (all both 64-bit and 32-bit), as well as RTAS (32-bit only)

http://www.fabfilter.com/products/pro-c-2-compressor-plug-in