Matthieu Brucher has announced the update of ATKSidechainCompressor, his dual channel compressor plug-in, and ATKSideChainExpander, his dual channel expander plug-in, for 64-bit Mac OS X (10.8 minimum) and Windows (32 and 64-bit) in VST2, VST3 and AU plug-in formats.
These new versions have more parameters than the previous ones, which means that the parameters used in a project with the former version won't be loaded in the same way for these new versions.
These stereo plugins can work on two channels, left/right or middle/side, possibly in linked mode (only one set of parameters), and can be set up to mix the input signal with the compressed signal (serial/parallel compression). The side chain channels can be used to steer the gain stage (the same setup will be used, right/left or middle/side), depending on the switch on the top right of the plugins. The same coloration stage from ATKColoredCompressor and ATKColoredExpander are used here.