This guitar lesson is about a harmonic concept mapped out and developped by jazz musician Barry harris that can be found in the book "The Barry Harris Harmonic Method For Guitar" by Alan Kingstone.
This blog article details a little bit more in depth about what is the major 6 diminished scale and how to harmonize it with major 6 and diminished 7 chords.
In this guitar lesson you will learn how to transform a diminished 7 chord into a dominant 7 and also a minor 6 chord either by lowering or raising only one note in order to get a smooth transition.