@ spiritual.jedi There is a particular way of doing AUM most people don't know about. "AH" "OOH" "MM" are the only sounds you can make without using your tongue, the technique is simple but you do need to know what you are doing and it goes like this:
Breathe in deeply, open your mouth wide and made vibrate a long "AHHHHHHHHHHHHHHH" keep doing this and while you are making the "Ah" sound slowly begin to close your mouth, as your mouth closes in, the "Ah" sound will turn into an "Ooohh" sound by itself, once your lips meet and your mouth closes it will then turn into an "mmmmmm" sound by itself too.
Remember to close your mouth very slowly.