53 exercises and 53 audio tracks to learn to play the essential chords in twelve keys with chord sequences. Chords : C5, D5, E5, F5, G5, A5, B5, C#5, D#5, F#5, G#5, A#5, B#5, Csus2, Dsus2, Esus2, Fsus2, Gsus2, Asus2, Bsus2, C#sus2, D#sus2, F#sus2, G#sus2, A#sus2, Csus4, Dsus4, Esus4, Fsus4, Gsus4, Asus4, Bsus4, C#sus4, D#sus4, F#sus4, G#sus4, A#sus4, CM7, DM7, EM7, FM7, GM7, AM7, BM7, C#M7, D#M7, F#M7, G#M7, A#M7, C9, D9, E9, F9, G9, A9, B9, C#9, D#9, F#9, G#9, A#9, Cadd9, Dadd9, Eadd9, Fadd9, Gadd9, Aadd9, Badd9, C#add9, D#add9, F#add9, G#add9, A#add9, Cdim7, Ddim7, Edim7, Fdim7, Gdim7, Adim7, Bdim7, C#dim7, D#dim7, F#dim7, G#dim7, A#dim7, Caug, Daug, Eaug, Faug, Gaug, Aaug, Baug, C#aug, D#aug, F#aug, G#aug, A#aug.