Watch the No, Not One - 3 online guitar lesson by Richard Kiser from Gospel Fingerstyle Guitar
The intro will consist of alternating the bass lines in a 6-4, 5-4 string configuration while playing the second and third strings of the D chord. Be sure and let the D note on the sixth string ring out and sustain for that deep drone effect. You can see that I only mute the note lightly on every four counts. The "hammer on" effect is played on the fifth string second fret, not the sixth string as i misquoted in the video. Just remember that the intro will actually be setting the tempo as well as the attitude of the song so play it with feeling. This intro is a great exercise to get your alternating bass line smooth and tight for almost any fingerstyle tune so use this lesson to practice your alternating bass.