Watch the Week 3: Building Chord Progressions From The Major Scale online guitar lesson by Rob Garland from Songwriting For The Guitar
Let's focus on harmonizing the major scale as 4 note chords. In the key of C, the chords become Cmaj7, Dm7, Em7, Fmaj7, G7, Am7, Bm7b5. We'll be playing the chords in the open position and as movable shapes across the neck. I'll illustrate the difference adding a 7th (4th note) to the chords of a simple progression can make (using IV iii ii I in the key of C) evoking a Steely Dan type sound.