Interval structure of Major triad
Section outline
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It is common to see a chord as a structure of major and minor thirds.
A major triad contains a major third with a minor third stacked above it,
Major triad :

For example in C major C-E-G- C-E is M3
- E-G is m3
Chord label for a major triad is the root note:
C D E F G A B
- sharp roots C# D# E# F# G# A# (B#)
- flat roots Cb Db Eb (Fb) Gb Ab Bb