Hmm.. well I attempt to growl. I'm female and really small (5'0) so it's difficult for me too especially since my voice is really quiet but what I do is drink a glass of water before attempting, clear your throat and then bend over and touch your toes (if you can reach) and then turn on the song and like, try not to use your throat.. as someone said earlier. Well.. I would recommend watching live videos of your favorite bands, to see how their posture is, just take notice of how they do their shit.. low death grunts, high pitch growls... whether they crouch over while doing a death grunt or if they stand up straight and leaning back for a high pitch. I guess it takes some math when it comes to all this.. depending on height, etc. Hm, yes. Bend over and touch your toes.. lol.