In music, a lot or harmony is made up of chords built on pitches with intervals of stacked thirds to each other – hence, that is why they are called “triads.”
In the world of triads, you get chord types like major, minor, augmented, and diminished depending on the combination of thirds between pitches.
Now, what would happen if we were to change the rules of building chords? Instead of stacking thirds… how about we try one interval up: a fourth? Quartal chords.
A lot of listening and experimenting will be involved to find out sonically which chords built on fourths within the key sound like the I – IV – V etc. Also, you can play around with stacking other intervals.
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