Ninth Chords

What is the difference between a 9th chord and a suspended 2nd chord?

Usually a 9th chord:
--has a 3rd
--assume a 7th

Sus 2
--would have to notate a 7th if desired: sus2 add7

-------------

Dom 9

C9

This chord is used to fatten up a dom7th chord.
Sometimes it is indicated in a fake chart simply cuz the melody adds the 9th.


G9 CM7 A9 DM7

With the 9th, you can leave out the 5th.

---------------

Minor 9ths

the only difference between a min 9th chord and the dom 9th chord is that the minor 9th is built on a minor triad.
The added note is still a maj 9th above the root of the chord.


iim7 V7 I

can be enriched by subbing

iim9 V9 Imaj7


------------

Major 9ths

used in the more sophisticated ballads and not standards.

Maj 9 M9

---------------

Other 9th chords:

C7b9
C7#9

C7b5b9
C7b5#9
C7#5#9
Caug7b9


The #9 is not seen as often as the b9.

-------------

2 other 9th chords that occasionally appear.

--one is the suspended 9th for the 9th chord with no 7th.
--The other is the 6/9 which indicates a major triad with major 6th and maj 9th added but no sevenths. --this is an airy suspended sound, particularly when voiced with 2 superimposed perfect 4th intervals.

G 6/9

LH: G D G
RH; B E A (P4)