http://www.dolphinstreet.com http://MasterGuitarAcademy.com the guitar used is a Hell Zerodot, from http://www.hellguitars.com
Here is a free blues guitar lesson for how to play a shuffle rhythm, as well as 2 note chords (dyads). Sign up on my website and get free guitar lessons via email for over a year's time!
This lesson is played in the key of A.
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