I think if someone's teeth are overbite he needs an open embouchure. Pls. give me more information on open embou. On how to use the lips on ascending and descending notes. Where to place the tounge and placement when tonguing more and same notes... and others.

If the lips opening is not big and the muscles tends to move to center a little but also feels to smile a little (to make the mouth corners firmer) does he needs to feel a little buzzing to make a sound??

Pls. discuss the advantages and disadv. Thank you

You have to hold the trumpet a little angle downward.

Also some say you dont have to make an open embouchure if your mouthpiece is smaller let say the cup diameter is less than 17 mm, I dont know if it's true.

I like to learn without paying a single dime (or penny for that matter). I would go here: http://www.trumpetthink.com/embouch.htm

It's a list of different embouchures you can try using. It's a great resource. Personally, you need your teeth apart but enough to get sound. For pedal notes you would open your teeth even more. For high register notes, you would close your teeth half of a millimeter but still their open. For pedal notes, a Maggio embouchure is ideal. For high register, use a Farkas or a Steven's embouchure. But with Farkas you would have to work harder for the high notes and the mouthpiece is the only resistance there is, which is not healty.

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