Thirds & Sevenths

1 week ago by @carleybaer

Thirds & Sevenths

carleybaer

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Liner Notes

#girl-with-piano #music-theory #nerd-rock

The relationship between 3rds and 7ths has been a favorite theory topic of mine since I did my first harmonic analysis in undergrad. I started singing the first line of the song on my drive to school today, and wrote the rest of it between students, and figured I ought to share it with the other theory nerds of FAWM.

Lyrics

If I sing a major third on the root it becomes a major seventh when I go to the IV
If I sing a flat seventh it resolves to a major third when I go to the IV
Thirds and sevenths

Their relationship is unstable
It’s even been called the devil’s interval
But together they’re part of functional harmony
The seventh of V goes down to the three

Of the root and we’re back to the third which becomes major seventh when I go to the IV
And then I’m back to flat seven resolving to the major third when I go to the IV
Thirds and sevenths

The third of the V becomes major seventh of the root
The third of the V becomes a major seventh of the root
Then it’s the tritone of the IV
The unstable tritone of the IV and then we are

Back to the major third which is a major seven when I go to the IV
And the dominant seven points down to the major third when I go to the IV
Thirds and sevenths
Talking about thirds and sevenths
All the music theory nerds are in heaven
When we talk about thirds and sevenths

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