This book is meant to be used as a companion to the book "Overtones of bel canto" by Berton Coffin. With this book and the accompanying audio series singers and teachers can learn to read and apply the methods of Berton Coffin. This book is the result of 35 years of teaching Coffin's methods, and answering questions on how to apply his methods from singers internationally. The Audio series may be found on ITunes and Google play by typing Berton Coffin or Overtones of bel canto in the search field