Watch the Guide Tone/Root Structures online guitar lesson by Brad Carlton from Guitar Lab: ii V I Options

This lesson adds a voice on the first string on top of the guide tone/root structures for each of the chords in the ii V I progression in the key of D. Diagrams 38 through 40 show the numerical analyses of these notes as they are added over each chord. Be sure to memorize these numbers as they will serve you in any key.