“DSG fart” – what is feasible?

moin people, think most know it : a GTI gives gas and when switching comes the well-known fart/knapping. some find it awesome.. some terrible. I stand there and I find great. now to my question : how exactly does it come to stand? and is it possible to get it in my audio a5 too? and if yes what has to be changed? must the ignition time be changed? if yes, where? drive a 2,0tfsi optimized and sport AGA. can someone help me? thank you in advance!