"Usable! Code Theory: A Creator's Lesson That Doesn't Require Rote Memorization" Goki Ishida / Hirotaka Kumakawa / Masahiro Oura Price: 2,000 yen + tax A complete explanation of the mechanics of chords from the perspective of "overtoneism"! A new era music theory book that leads all musicians to the next level is born A new era code theory book that will impress all musicians, from beginners to veterans, is born here! This book condenses the latest research results based on "overtoneism," which forms the basis of all music. Where does the difference in chord sounds come from? Why do sounds connect? We will explain the essence of code theory, which you can't learn anywhere else, in an extremely easy-to-understand manner. Also, this is not just a "theory book that you read and finish." We promise that the power to "feel chords and manipulate them freely" sleeping within you will awaken rapidly through the "practical work that doesn't require rote memorization," fully utilizing the learning support materials "Palette & Recipe" uniquely developed by the production team. Get the true freedom of code theory, composition, performance, and music! 【CONTENTS】 INTRO1 Why "Usable! Code Theory"? INTRO2 Essential knowledge for code theory that you must know PART1 Basic techniques for songwriting! Part 1. Covering diatonic chords PART2 Basic techniques for songwriting! Part 2. Note connection & voicing freely PART3 Applied techniques for songwriting! Part 1. Dominant chords in full bloom PART4 The hidden world of songwriting!? Minor key complement PART5 Applied techniques for songwriting! Part 2. Tension chords with a single stroke PART6 Advanced techniques for songwriting! Minor borrowing & modulation freely APPENDIX Super useful! Common chord progressions #GokiIshida #Goki_Ishida #HirotakaKumakawa #Hirotaka_Kumakawa #MasahiroOura #Masahiro_Oura #book #art/music/dance"