Book excerpt: An in-depth look at the applications of music theory for the bass guitar. This music instruction manual focuses on chord structures and increasingly complex harmonies. Music theory is a tool of creativity. This book is designed to unlock the mysteries of harmony for direct application to the bass guitar. Allowing the bassist greater freedom of melodic expression. Easy to understand with extensive diagrams. There are eight sections of this book. They are Music Theory, Triad Chords, Dominant 7th Chords, The Cadences, 7th chord types, The 6th Chords & Sus Chords, Extended Harmony, And Altered chords.