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Watch the Tritones With Chord Fragments online guitar lesson by Carl Verheyen from S.W.A.T. Rhythm

Starting with the tritone I'm able to add some upper structure tensions like the 13th and the 9th to add harmonic interest to the chord. That, combined with some funky 9th chords makes for an inventive method of getting through a chorus or 2 of a bluesy progression like this one with a keyboard player.