The IK Multimedia Quad Comp - Multi-Band Compressor (Download) is a dynamic processor plug-in that features up to four selectable frequency bands with adjustable compression per band. This enables you to process part of a signal's frequency spectrum without affecting other sounds within the spectrum. Each compression band features an adjustable threshold, compression ratio, attack time, release time, and gain level. The software also allows you to select the slope of the frequency crossovers to limit the influence of artifacts between bands.
Often the compressor will be placed on a stereo master bus to control peaks in program material, but can also be used to control inconsistent dynamics in solo tracks such as vocals and bass.
In the user interface, a display indicates the amount of gain reduction per band as well as the overall Left and Right stereo output levels. The bands can be linked and each band can be soloed or bypassed to observe the effects of the compression. A mid side button enables mid-side compression wherein the mid channel is the mono sum of the sound stage and the side channel is the difference between the left and right channels. A master bypass switch allows you to A/B the effect of the processing on the entire signal, and a reset switch can be used to restore the original settings.
The plug-in is fully compatible with native 32- and 64-bit applications on both Mac OS X (Universal Binary) and Windows (XP/Vista/7/8) computers. It supports VST, RTAS, AAX, and Audio Units plug-in formats. It can also be used with the T-RackS CS standalone application (sold separately).