The 6/9 Chord is just what it sounds like - a chord that incorporates a 6th and a 9th. Let's check it out!
This chord is most often played in one of the two configurations seen below.
We can drop this shape in over any Major Chord for a lovely sophisticated sound. The Perfect 4th Interval created when we play the 6th and 9th together creates a unique feeling. You can even play this chord on the Dominant if you want to.
There's no complex theory here, it's just a great chord that sees a lot of use in some jazz tunes!
Try incorporating it into your own playing, especially on the Tonic!