UM's Attempts at growls

generally high in pitch and raspy. just take a DM growl up a couple octaves

my attempts at BM vocals always come out more like goregrind than BM
~gR~
 
how do you do the squeals, burps, and gurgles in goregrind? I can't figure those out. I can make my voice clicky which sort of sounds like the burping but it's really hard to get any decent volume with it.