Re: What's "growling"?
Altimssimo multiphonics are a really cool way to get a growl, but they're pretty hard to do. Whenever you hear Michael Brecker or David Sanborn play a screamin' high note, its probably that. There are special fingerings for altissimo multiphonics. The one I had the easiest time getting down was high G#. I use
123/*** with the side C, or *23/*23. It'll take a while to learn, but thats a really cool effect.