Watch the Open D Tuning online guitar lesson by Vicki Genfan from Essentials: Open Tunings
I have incorrectly called the 2nd chord in the intro an A chord over D, it is actually a G chord over D. Forgive me! In a typical Travis picking pattern the thumb simply alternates between 2 strings, typically the lowest root note of the chord and one other bass note - often times the 5th or octave. In this etude I've given you a slight variation on this. The thumb actually uses 3 bass notes in an alternating pattern for the chords that have the 6th string as its root. I really like this variation in that it gives us more color tones, hence more depth and in my opinion, adds more beauty to the piece.