André Hajdu composed, in Paris, a book for guitar called "MICROCOSMOS for GUITAR". These are small pieces designed to learn how to play the guitar in the most musical way possible. This title refers to the title of the books composed by Béla Bartók: "MICROCOSMOS for PIANO". André Hadju was a pupil of Anton Kodaly who, together with Béla Bartók, revolutionized musical education in Hungary, giving to this day the greatest musicians. How to get into music without worrying about language or grammar? How to eliminate the difficulties of a child or an amateur wanting to study the music sincerely? In the school system of many countries, political thought institutes a selection. For example, the amateur, before beginning to practice his instrument must learn to read music for 3 years, passed by the classes of music theory, which allows the system to eliminate many candidates. These candidates do not always have the patience to wait for a hypothetical entry in...