Mastering Compressor offers the cleanest compression we've heard to date, and it's capable of extreme punch when required.
In testing, the first thing that struck us about Mastering Compressor was its flexibility. Operated via a clean, clear and decidedly old-school interface, it allows ratios from 1.01:1 to 100.0:1, and then Inf:1 (for use as a brickwall limiter).
The threshold goes down to -60dB in 0.1dB increments, and the attack and release knobs can be set to lightning fast or invisibly slow.
Mastering Compressor has two knee controls: Knee1 softens the default hard-knee operation so that the compression amount is applied along a gentle curve as the signal approaches the threshold. Meanwhile, Knee2 gradually returns the loudest parts of the input signal from their compressed ratio to a 1:1 ratio (in other words, no compression) as they exceed the threshold. This is useful for letting peak transients through, giving further transparency.
Transparent and intelligent, Sonoris' Mastering Compressor is one of the very finest dynamics tools we've ever loaded on our master bus.5 Stars