An attempt to quasi-emulate a hardware compressor. The makeup gain feeds into an expander and then a saturator and subtle dynamic tube giving you a compression curve similar to older hardware versions. If you have a slower attack it means your transients will kick into the expander and really slam into the saturators for an extra splash.
There are two knobs giving you more analog flavouring "Vintage" and "Mouth Feel". Play with them till they sound good, or put a cork in them.
Proper gain stating or perhaps limiting may be required, depending on your program material.
Finally there is a wet/dry for all your parallel compression needs. New York New York!