Everything You Ever Wanted to Know about 7th Chords

From LivingPianos.

https://livingpianos.com/everything-you-ever-wanted-to-know-about-7th-chords/
Welcome to LivingPianos.com, I’m Robert Estrin. Today, you’re going to learn everything you ever wanted to know about 7th chords. I recently put out a video about triads. Triads are chords built on thirds containing three notes. 7th chords are kind of an extension of triads. A major triad consists of two different types of thirds: a major third on the bottom and a minor third on top. A minor third on the bottom and a major third on the top gives you your minor triad. A diminished triad consists of two minor thirds. An augmented triad consists of two major thirds.