Yes, it's a terrible pun, but I believe the Skrillexish growl in this tutorial can be replicated in ZynAddSubFx. I tried for a little bit, but got stumped on varying the modulation. Perhaps one of you could crack this? (and PLEASE let us know how you did it)
https://www.youtube.com/watch?v=gprv-cUDtfo
https://www.youtube.com/watch?v=gprv-cUDtfo