There are a total of 1,524 (!) audio exercises that come with the book. When you purchase the book, you receive a code that allows you to download the complete audio library. This gives the book much more value than just the book itself. It’s a complete singing course that you can follow at home at your own pace. Each exercise is “demonstrated” by a woman and by a man. This is followed by accompaniment only, so you can perform the exercise yourself.