Creaky, growl, grunt and overdrive, shown on real endoscopy footage, then three singers coached live into their first safe distortion.

Fernando Zimmermann opens with endoscopy footage of his own throat, showing exactly what the vocal folds, epiglottis and ventricular folds do in each of his four distortion families: creaky, growl, grunt and overdrive. Then he coaches three singers live. You'll watch a clean-voiced classic rock singer find creaky through sirens and an old-witch character, a metal fan wrestle overdrive down to sustainable pressure using a nasty nasal buzz and weight-lifting imagery, and a musical theatre singer build growl from tongue retraction and throat clearing. Along the way he explains why a solid mix should come first, why overdrive is hardest to master, and how to build stamina gradually.