Watch the What the Funk online guitar lesson by David Santos from 50 Bass Grooves You MUST Know
Here's a real funky line using the low third of the dominant 7th chord of the moment. A very historic piece of bass information and R&B identity is the dropping to the low third and climbing to the fifth of the chord. Sometimes the climb contains all of the chromatic notes found between the third and the fifth and sometimes it leaves one out. In this line we use combinations of chromatic and non-chromatic climbs from the third to the fifth as well as half step approach tones and other ways of approaching a given target note. Very funky stuff to add to your trick bag.