An In-Depth Look at Extended Chords

Exploring Extended Chords: Ninth, Eleventh, and Thirteenth Chords

Extended chords add depth and complexity to harmonic structures, creating rich, layered sounds that are essential in jazz, classical, and contemporary music. These chords build upon the basic seventh chord by adding additional notes a third higher, extending the harmonic palette.


Types of Extended Chords:

  • Ninth Chords (C9, D9, E9, etc.): Formed by adding a major third to a dominant seventh chord. This chord includes the root, major third, perfect fifth, minor seventh, and major ninth. It has a lush, expansive sound that enhances musical progressions.
  • Eleventh Chords (C11, D11, E11, etc.): Built by extending a ninth chord with a minor third. It comprises the root, major third, perfect fifth, minor seventh, major ninth, and perfect eleventh. Eleventh chords add a deeper, more resonant quality to the harmony.
  • Thirteenth Chords (C13, D13, E13, etc.): Created by adding a major third to an eleventh chord. This chord includes the root, major third, perfect fifth, minor seventh, major ninth, perfect eleventh, and major thirteenth. Thirteenth chords provide a full, intricate sound that is both rich and versatile.

Visual Representation: For a clearer understanding, refer to diagrams showing these extended chords in various keys:


Ninth Chords:


Eleventh Chords:


Thirteenth Chords:


Conclusion: Understanding and using extended chords can significantly enhance your musical compositions and improvisations. These chords offer a broader harmonic range and greater expressive potential, making them indispensable tools for any musician looking to deepen their harmonic knowledge and creative expression. Explore our detailed diagrams and guides to see how these chords can be integrated into your music.

Jul 31,2024