Watch the Straight Rock Blues online guitar lesson by Jeff McErlain from Blues Guitar Survival Guide - Lead
The country or rootsy rock sound is coming from the double stops I am adding in. These licks primarily mimic the pedal steel and are a staple of country music. Jimmy Page used them all the time as well. The trick in this case is to bend the b3rd of the chord to the natural 3rd while keeping the other notes stable. It takes a little time and coordination but they sound great and really add another dimension to your playing. The added bonus is that these kind of licks make us think about the guitar more clearly, they help us envision the chord on the guitar. Once again, that concept of knowing the fingerboard come out.