Augmented sixth chord

An augmented sixth chord is a fancy way of making music sound special and interesting. It's like a secret chord that adds a lot of flavor to a song.

To understand this, think about a regular ol' chord - like the kind you might play on a guitar or piano. This chord is made up of three notes: the root note (which is the main note the chord is built around), the third note (which is two steps above the root note), and the fifth note (which is three and a half steps above the root note).

Now, an augmented sixth chord is a little different. It's made up of four notes, and they're tuned in a special way to make our ears perk up and go "oooh, that sounds cool!"

The four notes in an augmented sixth chord are:

- The root note (just like in a regular chord)
- The major sixth note (which is nine steps above the root note)
- The augmented sixth note (which is ten steps above the root note and is higher than a regular sixth note)
- The fifth note (just like in a regular chord)

So why does this chord sound so special? Well, it's all about the way the notes interact with each other. The major sixth and the augmented sixth notes create a really interesting tension that resolves when the chord moves to another chord. It's kind of like a little musical cliffhanger - it makes you want to keep listening to hear what comes next.

So next time you're listening to a song and you hear a really cool chord that grabs your attention, it might just be an augmented sixth chord at work!