The solo begins over a G major chord, and in bar 1, I play the notes of a G major triad – G, B, D, G – in a syncopated rhythm. While sustaining the G note into bar 2, the chord beneath it switches to ...

In blues ‘dominant’ 7 chords (A7 or D7 for example) are more common than basic major, minor and sus chords. The A7, D7 and E9 shapes shown here are all you need for a 12-bar blues improv in the key of ...