Major vs minor — the feeling
Concept
Major keys feel bright and resolved. Minor keys feel dark or sad. The difference is one note: the 3rd. Major 3rd = 4 semitones above the root. Minor 3rd = 3 semitones.
It's just one note
A C major chord is C, E, G. A C minor chord is C, Eb, G. Same root, same 5th — only the middle note (the 3rd) changes by a single half step.
That one note is responsible for the entire mood difference. Music is full of moments where this matters more than anything else.
Hear it on guitar
- E major (frets [0,2,2,1,0,0]) → bright, resolved.
- E minor (frets [0,2,2,0,0,0]) → moody, melancholy.
The only difference: in E major your index finger sits on the G string fret 1 (raising G to G#, the major 3rd). Remove it and the chord becomes Em.
Beyond major and minor
There are other 3rds: diminished (b3 with b5) and augmented (3 with #5). Most pop music sticks to major and minor; we'll cover the rest later. For now: 3rd up = major, 3rd flattened = minor.
Key takeaways
- •Major vs minor = one note (the 3rd).
- •Major 3rd is 4 half steps up; minor 3rd is 3.
- •Same root + different 3rd = a totally different feel.
Glossary
- Triad
- A 3-note chord: root, 3rd, 5th.
- Quality
- Whether a chord is major, minor, diminished, augmented, etc.
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