Excerpt: Learn simple blues phrasing to play over the I, IV and V Chords. Foundation for this lesson: 12-Bar A Blues, played with R 3 7 Chords. Guitar: Gibson Les Paul R9 (2002). Fender Pro Reverb (2). Lehle P-Split. D’Addario XS (.010-.046) Strings. Providence E205TF Cables. Pickboy TF Signature.