John Sebastian of the "Lovin` Spoonful does the harp work in this Doors classic This is the intro the rest can be worked out from this -(23) -(23) -(23) -(23) -(23) -(23) 4 b-3 back to -(23) and repeat the -(23) is played as in kissing the 4 b-3 is blow on the fourth hole then bend on the inhale third hole