Looking at it from the point of view of the intervals between the chord tones, the formulas are root + 4 semitones + 3 semitones for a major triad, and root + 3 semitones + 4 semitones for a minor ...

A chord’s major or minor-ness is known as its quality, and chord quality depends on the number of semitones or ‘interval’ between the third and root note. Diatonic chords mean you can only use scale ...

To many people, minor chord progressions in music “sound sad” while songs in a major key “sound happy”. But for researchers who study how people respond to music, it has always been ...