Here is another interesting look at how notes conveniently line themselves up in standard/dropped D for slide. I've played this in D, but these positions exist for any other chord. They may jog themselves into new octaves, but these double stops belong to all keys. If you think of a minor key as an inverted major key (Am is to C), then you can apply them to minor keys too.

Thismonth's lesson shows how you can play a major scale in double stops, all of which line up for the slide. I did say 'conveniently' before ... some of you may wonder why these huge leaps up and down the fretboard could be termed 'convenient', but with practice, they're all a piece of cake. Once you train your hand/eye/ear to make these big jumps, it doesn't really matter how far apart they are.

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The movie shows a D major scale starting on the open D string. The way I did it here is to play the first three notes (D - E - F#) as single notes, but form then on, I play double stops all the way up through the rest of the first octave, then a complete second octave. The top note of each double stop is the one carrying the scale 'melody' with it, the harmony note is always below.

The way the line-ups arrange themselves creates a non-parallel harmony ... in other words, the bottom line is not is not climbing through the scale in step with the top line. Some are thirds, some are fourths. A good exercise would be for you to figure out which are which.

To satisfy your curiosity, if indeed you are curious, here is a midi file of the top line. Major scale all the way. Here is the lower line, the harmony below. You can hear how repeats the odd note, and how it jumps here an there. It's important to grok that I didn't really choose for it to be this way. It was the need for line-em-ups that sort of forced this harmony upon me.

The graphic below shows all the line-ups that come into play. If you have a good knowledge of the fretboard, especially if you've read PlaneTalk, then you'll instantly see that they're all (with one exception) fragments of either the I, IV or V chords. Once again, we see that the I-IV-V chords are ever present in any piece of music or exercise like this. The last lesson also was an exercise in creating music from the I-IV-V chords. The sooner you make it second nature to instantly know and see these three chords together on the fretboard, the sooner you will have a solid reliable map. Each of the double stops I play is just two-notes-big, so some of the line-em-ups in the pic below accommodate more than one. When I look at the diagram, all I see are D, A and G chords, or fragments thereof... and one Em.

If you are having trouble recognizing these double stops, Check out my book PlaneTalk. It teaches the trick to it.

The muting hand is very busy. Thank goodness it's operating on auto pilot, because if I had to actually think about which strings were in play and which needed muting, I wouldn't be able to do it. Endless practice is the only way to get the muting hand working properly. Throw your picks away for this kind of playing. They just get in the way.

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