Watch the Feelin' Blue online guitar lesson by Brad Carlton from Chord Studies: Double-Stops Vol. 1
This example is also in the key of A, but this time we've changed our tonality. In the first two examples, you heard a very major scale sound but now we are getting a bit of a bluesier sound. This is because we are in A Mixolydian - a fancy way of saying "the key of A Major with a flatted seventh." We start with a double stop of C♯ and E and then move up to the next two notes in the A mixolydian mode, namely D and F♯. We then move up to the next two notes again, this time E and G. It is the G in the voicing which gives you the A7 sound and creates the bluesy flavor here. Notice the difference between the third chords of this progression and the "Less Is More" progression. We only changed one fret but it makes a world of difference! See if you can use them together.