Caesari’s treatment of the passaggio (the transition area between registers) is detailed and pragmatic. He rejects the notion of "breaking" into different voices, arguing instead for a blending process. He asserts that the "mix" is achieved not by a compromise of volume, but by a modification of vowel formants and a relaxation of the laryngeal musculature. He warns against the "call" of the voice—shouting in the upper range—and instead advocates for the "turning over" of the voice into the head resonators.
Central to the book is the idea that the mind must lead the body. Caesari argues that a clear mental concept of the desired tone is a prerequisite for physical coordination. This anticipates modern sports psychology and motor learning theories, which suggest that the "internal model" dictates motor output. For Caesari, "placement" is not merely a physical target but a mental direction of energy. the voice of the mind herbert caesari pdf
The Voice of the Mind by Herbert Caesari: The Lost Manual for Inner Hearing Caesari’s treatment of the passaggio (the transition area