Watch the Dominant Soloing 1: 18 online guitar lesson by Brad Carlton from Bluesology 1

The 7/6 add flat 3 sound for the V7 chord and the IV blues scale add 3 for the IV7 chord will be demonstrated in this lesson along with a review of the chords, scales and arpeggios for the entire 12 bar blues.
Some examples of how to mix it all up on a 12 bar blues will be found in this segment as well.