Why Major and Minor Are Often the Same in 2-5-1 Progressions
What was the question?
Dave asked for clarification on earlier statements regarding the concept that "major equals minor" in jazz progressions. He specifically brought up how Wes Montgomeryseemed to think in major keys while Pat Martino famously converted everything to minor, asking if seeing the 2-5-1 through a relative major/minor lens was the best approach at [42:35].
The core idea (in plain English)
While the relative major/minor relationship is a helpful shortcut, the real reason major and minor are functionally identical in jazz comes down to upper structures and cadences. When you play a major upper structure over a minor chord, you generate the exact same forward-moving tension. Furthermore, many jazz legends view the tonic 1 chord as a 6 chord, relying on relative minor shapes to dictate their phrasing across the progression [44:10].
Fretboard breakdown (what to play)
The relative substitution: Realize that a C6 chord and an A minor 7 chord share the exact same notes on the fretboard. When playing over a C major tonic, you can comfortably output A minor vocabulary [44:10].
Matches in cadences: If you look at the progression Bm7b5 to E7 resolving to Am, the structural motion and half-step resolutions function almost identically to Dm7 to G7 resolving to Cmaj [45:22].
Targeting the half-step: No matter if the progression is major or minor, your goal as a guitarist is to locate the upper structure resolution point. Find the voice leading note that moves by a half step to the third of the incoming tonic [47:11].
The suspended vamp: Sometimes, instead of a distinct minor moving to dominant, you can treat a 2-5 section as one giant suspended "non-tonic" space. Wes Montgomery often vamped over a dominant chord by just playing a minor chord built entirely off the fifth [51:59].
Common mistake to avoid
Many guitarists make the mistake of seeing the 2 chord and the 5 chord as two completely isolated events that require entirely different scales. Instead, try viewing the 2-5 as a single "non-tonic" space. Your only job in this space is to create motion that leads back home to the tonic chord [50:32].
A 10-minute practice assignment
Take the opening changes to a standard like "Fly Me to the Moon". Play through the minor 2-5-1 (Bm7b5 - E7 - Am) and then the major 2-5-1 (Dm7 - G7 - Cmaj) that follows. Notice how you can use the exact same diminished passing chord structure to resolve into both the minor tonic and the major tonic [47:11].
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