Structural functions of harmony
Arnold SCHOENBERG

"This book contains more pages of musical examples - about 90 - than pages of text - about 85. I consider this as one of its advantages. Its purpose is to give as short advice as possible while illustrating them abundantly. I consider it a supplement to my HARMONIEHRE (TREATY OF HARMONY) which will be published shortly. Chapter II, however, briefly summarizes the Principles of Harmony, which will be of use to students if they have been educated in other ways.

This book contains many new theoretical and pedagogical methods that I developed myself during 50 years of teaching. I particularly want to draw your attention to the Assessment of Regions (Chapter IX) as its effectiveness is important for the analysis (Chapter X, etc.). I would also like to mention the theoretical and practical advice concerning the treatment of harmonic progressions (Chapter XI), one of the most important points of formal construction. Finally, this book gives descriptions and definitions of many forms that have not yet been processed. "

Arnold Schoenberg, 1948

"Today's critics and theorists [...] have filled magazines, newspapers, and even volumes of brilliant, profound commentary [...]. A few weeks after their publication there is usually not much left [...]. But it is thirty-six years since the Treaty of Harmony was written, and still today it serves. This will continue for quite some time, and so will the Structural Functions of Harmony. I recommend reading this book to those who really want to learn something. "

René Leibowitz, 1947