The book is dedicated to the secrets of improving the singing and speaking voice based on the resonance technique, i.e. activating the resonators of the vocal apparatus in interaction with the work of breathing and the larynx in order to improve the timbre and strengthen the voice, achieve its lightness, flight, tirelessness and protection of the larynx from overload and illness. Contains statements and methodological recommendations from outstanding singers, experienced vocal and speech teachers, choirmasters on mastering the resonant technique of singing and speech. Descriptions of techniques are given in the form of interviews with masters of vocal art and based on the texts of methodological works of teachers. The book consists of five main sections: 1) experimental and theoretical foundations of resonance technology; 2) interviews with famous singers and articles by vocal teachers (or about them); 3) articles by choirmasters (or about them); 4) works of teachers on stage speech; 5) articles on correcting deficiencies and protecting the voice.