I came across this article ( http://www.loopblog.net/tutorials/studio-and-gear/studio-techniques/fattening-drums-with-multiple-busses/ ) and they mention compression ratios of ‘8:7:1’ and ‘1:5:1’.

Can someone please enlighten me to what the 3 digits represent? Obviously a 2 digit ratio is self explanatory, but does the 3rd number (I’m assuming the first) represent the threshold (not sure how) or is there some other magic behind this science?

BTW - has anyone tried the theory in the above article? Sort of another version of parallel compression I guess.

Thanks!