For the first time since Hugo Riemann, a book is presented that is based on a completely new rhythm theory: the 'theory of components'. Petersen's theses and analyses make it possible to describe and understand the rhythmic structure of music better than before. Whereas rhythm has been described simply as an interplay of longs and shorts with accents and metres up to now, Petersen shows that there are secondary rhythms apart from the basic rhythms which are not notated because they depend on ton...