Hi guys, I totally agree with Eric (that’s two days in a row haha, love ya work Eric). Too little pressure will not enable the oscillator to respond to the change in air pressure and therefore have a weak, airy sounds and more than likely air escaping at the aperture corners.

With lots of humming and a good idea of sound, you will be able to tell if “the lips are interacting with the air as if they are the vocal cords.”

Usually the issues is too much pressure and that can be alleviated by doing the #wihsc. Soft harmonic slurs for a long time are impossible with too much pressure.

Cheers,
Greg