Essential chords in 12 keys (5, 6, 7, 7#9, 7sus4, 9, 11, add9, aug, dim, m, m6, m7, m7b5, maj, maj7, sus2, sus4). Several shapes by chord. More 1000 Diagrams with fingerings, note names and intervals. Plus 50 backing track and 25 drum tracks.