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. | Coffin's Overtones of Bel Canto by Berton Coffin, Hardcover | Indigo Chapters