John Henny translates acoustics into what you actually say in a lesson - formants, vowels, jaw drop - then proves it on two live singers.

John Henny explains vocal acoustics the way a teacher uses them, not the way a textbook writes them. You will walk through source, resonator and radiator; how harmonics hit the vocal tract filter; and why vowels are really pitch perception, shown with sine-wave and spectrum demonstrations you can hear change in real time. Henny covers first and second formants, the undervowel and overvowel idea he credits to Ken Bozeman, chiaroscuro as the signature of a genuinely good mix, dropping the jaw to raise the first formant and dodge the flip, and inertive reactance - the alignment that makes a hard note suddenly feel effortless. He then coaches two live singers on jazz and musical theatre repertoire. Built for teachers who already hear the problem and want the why.