This C6/9 is movable to any key, preserving the stacking of notes with the root on the bottom and stacked 4ths on top. This makes a great substitute for a regular major chord if you’re looking ...

This has a standard root, major 3rd and minor 7th intervallic construction. In addition to these three standard dom7 chord tones, we can add altered 9th and 5th degree scale tones, namely the b9, #9, ...

Do you associate minor chords with sad music and major chords with happy music? If you do, you probably grew up surrounded by music that follows the basic rules of Western music theory.