9th Guitar Chords
... dominant 7th with an added 9th
There are 3 types of commonly used 9th guitar chords:
Dominant 9th (9), Major 9th (maj9), and Minor 9th (m9) chords are all derived from the dominant 7th, major 7th and minor 7th chords. We will illustrate this using the C Major Chord.
|Dominant 9th||A dominant 7th chord with an added 9th (C7/9 or C9)||1 - 3 - 5 - ♭7 - 9|
|Major 9th||A major 7th chord with an added 9th (Cmaj7/9 or Cmaj9)||1 - 3 - 5 - 7 - 9|
|Minor 9th||A minor 7th chord with an added 9th (Cm7/9 or Cm9)||1 - ♭3 - 5 - ♭7 - 9|
- If a chord with a symbol 9 is not preceded by the words major or maj, i.e., C9 & Cm9 as opposed to Cmaj9, the 7th is always a dominant 7th (♭7).
- This session is on Dominant 9th chords.
- A 9th chord or 9 chord is a musical interval spanning an octave plus a major second or 2 semitones. A dominant ninth chord consists of a root, a major 3rd, a perfect fifth, a minor 7th and a major ninth. It is considered a compound interval as it spans more than an octave.
- The featured song using 9th chords is Someone Like You by Adele.
Example... Calculating an E9 chord
- Dominant 9th Chords consist of the 1st, 3rd, 5th ♭7th and 9th notes of a Major Scale
- E chords, are based on the E major scale which has 4 sharps. The scale reads: E - F# - G# - A - B - C# - D#
- Formula for a 9th chord: 1 - 3 - 5 - ♭7 - 9. For calculating the 9, simply go back to the start of the Scale and count upwards so that the 8th note is E (octave above the tonic) and F# is the 9th note.
If you find this confusing, simply write the scale so that it contains 9 notes, i.e.,
E - F# - G# - A - B - C# - D# - E - F#
- Substitute the notes into the formula (1=E, 3=G#, 5=B, ♭7=D, 9=F#)
- E9 reads as follows: E - G# - B - D - F#