Edgar Herbert-Ceasari; 50 Vocalises Book π Voicing: Soprano & Mezzo-Soprano Vowelisation Exercises Edgar Herbert-Caesari's 50 Vocalises Book is a collection of 50 vowelisation exercises designed for soprano and mezzo-soprano vocalists. The book is aimed at building strength, stamina, and flexibility in the vocal muscles to improve accuracy and clarity of diction. The exercises in the book include English and Italian phonation, and are intended to work the vocal muscles to build up strength, stamina, and flexibility. By practicing these exercises, singers can improve their vocal control and develop a more powerful and agile singing voice. Edgar Herbert-Caesari was a renowned vocal coach and teacher who trained many successful singers, including Luciano Pavarotti, Maria Callas, and Joan Sutherland. His 50 Vocalises Book is a valuable resource for singers of all levels who are looking to improve their vocal technique and build a strong foundation for their singing career.