Watch the Franklin online guitar lesson by Fareed Haque from Soul Jazz Survival Guide
A few words on picking technique: Many of the great soul jazz guitarists play like George Benson, hand coming from below the strings, resting on the pickguard. And that is a great approach. However, there are two notable exceptions: one is Pat Martino, and the other is Grant Green. Both play with the wrist slightly anchored on bridge or on bass strings and hand coming over the strings from the bass side, not under from the treble side, as George does. That's how I pick, as does Al Dimeola and John McLaughlin. So, pretty good company I guess.
I wouldn't vote for one over the other, but I would say that while the overhand approach I use is a bit more difficult, it is ultimately more versatile, which doesn't mean better, just more useful in different situations. However, the underhand approach is generally speaking more swinging and syncopated, because the upstrokes on upbeats are often louder and more pointed than downstrokes, usually played on downbeats. You gotta choose, so make sure you listen hard and check out a bunch of cats and try both approaches to see what works for you. Either way, and this is important, you must hit the string with the side of the pick, not the flat edge. That's a big part of what allows us to develop speed. Overhanders play with pick angled toward treble side neck at approx. a 45 degree angle, sort of pointing at the upper bout of your guitar. Underhanders do just the opposite, pointing the pick towards the lower bout also at about a 45 degree angle. My next course: GUITAR CHOPS Survival Guide. Picking technique and classical guitar technique for everyone!