What belt actually is, physically and acoustically - then John Henny tunes four live singers into it, one vowel at a time, on Beyonce, Journey and Whitney.

Belt is a term in search of a definition. John Henny gives you his: a wide tent inside the even wider tent of mix. You'll get the physiology - fold contact, closed quotient, maximum flow declination rate - and the acoustics, explained with a Play-Doh press and a mixing board rather than a spectrogram you can't read. He unpacks under vowel versus over vowel, whoop versus yell, and how inertive reactance makes a big note feel effortless. Then he coaches four singers live, adjusting larynx, jaw, lips and tongue note by note. Includes extended Q&A on E vowels, breath support and larynx height.