Augmented Ninth
A9
intervalAt a Glance
- Formula:
- 9 augmented
- Notes:
- C, D#
Piano
Fretboard
A compound interval - larger than an octave. Shown here within a single octave, same as its simple equivalent.
What It Is
An octave plus an augmented second (15 half steps), enharmonically equal to a minor third one octave up.
How It Functions
The 'Hendrix chord' alteration - defines the sharp-9 tension in a Dominant 7#9 chord, common in blues, funk, and rock.
Real Song Examples
Real song examples aren't available yet - check back soon.