(Berklee Guide). This chord dictionary includes over 100 rock chord forms, from open-position chords to barre chords and drop-tunings, with a comprehensive glossary of the essential chords in all 12 keys. It is organized to reveal relationships between different types of chords and help you learn the voicings quickly and thoroughly in a way that is easy to remember. You will improve your comping and soloing, develop your fingerboard facility, and add more colors to your harmonic palette.