Sierra Tests Her Blowing Pressure (MP4 - 720p)
Sierra sets out to test her blowing pressure with our two most standard mouthpieces. She achieves some respectable pressures even though there is considerable audible leakage. We try a third mouthpiece, and then she proceeds to do a couple of hours of experiments that require considerable blowing effort. She then tries the pressure test once more, and demonstrates much better mastery of the mouthpieces.
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