Watch the Double Stops 1 online guitar lesson by TrueFire from Play Country Guitar 4: Rhythm Principles
Double Stops 1 - Part 1 is a video guitar lesson presented by Joe Dalton and is sourced from 100 Twang Thangs.
The basic scale used here is the major pentatonic. I used this scale as a guide and throw in the other notes from the major scale as needed. There are intervals of fourths, thirds, and sixths. An interval is the distance between the notes. A harmonic interval occurs when you play the notes simultaneously. A melodic interval occurs when one note follows the other. These double stops are harmonic intervals because they are played together. The two notes that start the phrase are E and A. If you count from E to A including both notes you get a fourth. Fourths are used in songs like the intro to Johnny B. Goode. The first four double stops in this example are fourths. Then I move to thirds. The sixths are toward the end. Most of the time you will be using thirds and sixths as the two notes of your double stops.