Of course, in this
Theory of Music , you will find all the information that appears in any complete theory, on notation, measure and rhythm, intervals, pitch, etc., but here each chapter is followed by a commentary entitled "To know more", which explains the reasons, historical or technical, which led to the rules and habits currently in force in Western music.
An important appendix covers topics that traditional theory generally not addressed, such Gregorian notation, medieval modality, or new techniques and signs emerged in the twentieth century: diatonic and chromatic mode, twelve-tone serialism, random music , special notation, encryption of the guitar in jazz.
The ensemble is illustrated with numerous examples borrowed from classical or contemporary composers.