
Also try moving the mouthpiece up or down on the embouchure.
Putting more top lip in the mouthpiece might help. Make sure he's
practicing every day, too - he's got to build up the embouchure
muscles. I always tell my kids it's like lifting weights - you
can't expect to lift 500 lbs the first day, but you can work up
to it by doing a tiny bit more every day.
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