Watch the Adding the 9th and 13th online guitar lesson by TrueFire from Play Jazz Guitar 7: Style Variations
Adding the 9th and 13th - Overview is a video guitar lesson presented by Fareed Haque and is sourced from Jazz Rock Workshop.
Proceed with this tip at your own risk! By adding the 9th and 13th to the pentatonic scale, we have turned the 5-note pentatonic scale (penta in Greek means 5) in to a 7-note scale.
This is sometimes called a Major scale. But don't tell anyone. It'll be our little secret.