@John Vere the patch that created these cracklings in particular was Abbyson and the second one in the pad list category!!!
I spent all Sunday afternoon trying multi-sockets around the house, changing cables, pc settings and cakewalk settings.
I loved Vital sounds, a lot of nice stuff and if you confirm that you have the same problem I can think of installing it again.
PS Crackling are totally absent in the exported file (mp3)
Thanks everyone for the help and answers ?