Watch the Chord Inventory online guitar lesson by Brad Carlton from Guitar Lab: Diatonic Chord Progressions
This lesson presents the chord inventory from which we will build diatonic two chord vamps. There are eight voicings derived from the open E chord. They are: E, FMaj7#11, F#7add4, G6, A add9, B add4, CMaj7, and D 6/9. There are also seven minor family voicings derived from the open Em chord. They are: Em, F#m 7/11, G#m add b6, Am add9, Bm add 4, C#m7, and Dm 6/9. All voicings are presented in diagram form along with their respective scales for soloing.
Study the theory as it applies to each voicing and scale option by memorizing the formulas and chord forms.