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The String Theory

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In the last installment of String Theory, we looked at brief sections of well-known songs that include a three-chord progression that I referred to as the “major chromatic drop,” wherein the root of a major chord descends to the major seventh, then to the minor, or “flatted,” seventh, followed by a resolution to a different chord (as happens with the standard minor drop progression that we explored previously). 

Classic examples of this move include the opening to Led Zeppelin’s “The Rain Song” and the first three chords of each verse in ”Something” by the Beatles. I’d now like to cite a few examples of other familiar, appealing chord progressions, which feature a similar kind of descending movement known as diatonic motion, through the major scale, as opposed to chromatic motion. It’s a somewhat tamer sound, harmonically, but pleasing to the ear nonetheless, and another workable songwriting device to consider using.

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A good, simple example of what I’m talking about here is the verse section of Glen Campbell’s arrangement of “Gentle On My Mind,” which he performed with a capo at the first fret. The guitarist begins on an open D chord then weaves an internal descending line into the voicing that walks halfway down the D major scale (D E F# G A B C#), from the root to the seventh, the sixth, and then the fifth—D Dmaj7 D6 D. A similar move can be found in “She’s Always a Woman” by Billy Joel, which is in the key of Eb. 

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During the second phrase of each verse, the pianist begins on the IV chord, Ab, then plays Abmaj7, then Ab6, then changes direction and goes back to Abmaj7. This chord sequence may be performed conveniently and gracefully on guitar using a capo at the third fret, as if it were in the key of F.

FIGURE 1 illustrates some nice ways to play all of the above-mentioned chord changes in a variety of guitar-friendly keys, using open chords or first-position grips. As you play through each set of chords, try rearranging their order. You may very well come up with a verse accompaniment for an original song!

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The intro and verses to Ozzy Osbourne’s “Mama, I’m Coming Home” feature guitarist Zakk Wylde performing a diatonic major drop on acoustic guitar (doubled by a 12-string) in the key of E, tuned down a half step, so that it sounds in Eb. Beautifully and conveniently incorporating the open B, high E and low E strings as ringing pedal tones within a flatpicked arpeggiation pattern, Wylde proceeds to walk down the E major scale (E F# G# A B C# D#), mostly on the G string, and the result is a shimmering sequence of note clusters that are formed using the fretboard path illustrated in

FIGURE 2.

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