Vincent Groos He was using the UAD Fatso in the Jr. mode which has a fixed compression ratio... I believe that the ratio changes dependant on the input level much like an LA-2A style comp does. That particular "compressor" was actually designed to emulate the sound of a tape machine so it lacks a lot of the options that say, an API 2500 has. What the Fatso (hard and software) excels at is the personality it imparts to the material; it does this by combining compression, saturation (warmth), and transformers into a big, fat, "woomph-y" sound. You essentially just dial in your signal and enjoy!

Madincraft Also, the transient punch that you speak of, IMHO, is more due to the fact that he is playing probably 40 separate drum samples all with varying degrees of micro-timing differences... thus giving it a flam-y type sound... when this hits the Fatso, being a signal-dependant compressor, it essentially gets "fooled' into allowing the transients passed its compressor architecture before it bites down into the body of the sound.

Madincraft Dude, that's actualy a very detailed and helpful answer, hahaha wasn't really expecting that xD Thnx bro!