When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In music theory, an extension is similar in concept to a house extension, except that, rather ...

Alright now we're talking about diminished chords. You can draw two boxes, we'll have a minor 3rd on top, and a minor 3rd on the bottom. And we can come over here and just flat that 5th degree, g flat ...