@michael – i’m getting slightly confused between Growling & fluttering.
Growling is humming while you blow?
Fluttering is rolling the tip of your tongue?
The first bit of my upload i was
going da-da-da-da-da-da with the
tip of my tongue – i’m trying to get the bat man sound dada-dada-dada-dada-dada-dada-bat man.
From :23 i was trying to flutter,
no i can’t flutter with the tip of
my tongue. What i did was folded my tongue into a V shape(like curled it up) and fluttered from the back of the tongue down the middle of the tongue – so i could
feel my inside mouth behaving like
a pnuematic drill.