Scream into your horn. Don't try to hum because when u just sing u mouth has already formed a seal on the mouthpiece so it's like ur humming. This helped me cause it was just a different perspective.

One word-didjeridu-the only decent thing Aussies have ever invented, failing that get a 4-5cm plastic tube over 1/2 a metre long, FAILING that just play a low, easy note like an alto E. To practise the growl just open your mouth (without the sax preferably alone) and make a low, guttural noise, don't shape your lips at all. Now do this on the instrument, pretty quickly you'll be able to growl with ease.

aussies... have created many musical things such as the superior ear training of the aboriginee people who are some of the few that could hear and recognize the properties of quarter tones

Quarter tones, really, where'd you learn that? ...but all that knowledge and they aren't even legally recognised as separate from the fauna (i.e. not human) until about the 70's. My biased reference is mere trans-Tasman rivalry. See I'm from Aotearoa (NZ) and largely because of sporting events, most important cricket (honestly cricket-the most boring of all major team sports) a joking sense of the other land's inferiority has been created, similar to USA vs Canada, or UK vs Ireland. For example, they call us "the black sheep of the family" or "sheepshaggers" (totally untrue) we make fun of them as being stupid (like dumb blonde jokes, English of the Irish etc.) or rascist (these are mostly not true). By the way what is with the USA's fascination with the Aussies, I know the're one of the few major nations in the "Coalition of the Willing" but that doesn't mean that a man who runs around in shorts catching crocodiles should be given his own movie, have you heard the accent-it's ridiculous! Back to music-Australia is actually pretty important to many Kiwi musicians, as New Zealand only has a popn of 4 million (just this year). For example if I ever became famous I would probably not make a lot of these jokes as I would be losing part of my audience. So where are you guys from?