Coffin's Overtones of Bel Canto

This book and the accompanying chromatic vowel chart present many exercises that will make the voice stronger and more musical according to the precepts of Bel Canto. Vowel-pitch relationships have been notated in 117 exercises for teachers and singers, using acoustical phonetics, register, and musical notation. The exercises will develop the musical-muscular skills of both male and female singers.