9 or add9

[The Fury]

What is the difference between a 9th chord and an add9 chord?
If an Eadd9 is E,B,G#,D and F# being the 9th note and an E9 is
E,B,G#,F# why is there a D in the add9 and how do you work out what it would be for other chords?

[ssiowi]

Hi F:

Dig it, have I actually grasped this sufficiently to answer your question? I think that I have; let's go.

E9: 1-3-5-9 ---------------------> E, G#, B, F#
E(+9): 1-3-5-b7-9 -------------> E, G#, B, D, F#

Someone who's really with the theory; please check my work.

Cheers from Portland.

[Andrew]

ssiowi, you have it almost right, but the wrong way round.

An E9's full name is E dominant 9th. This tells you it is a dominant 7th chord, with a 9th. It has E (1st), G#(3rd), B(5th), D(b7th) and F(9th).

An Eadd9 is E(1st), G#(3rd), B(5th) and F(9th).

So The Fury, you also had them the wrong way round.

Other dominant chords are E11 and E13.

These are dominant 7th chords with a 11, and a 13.
It is 'allowed' to put a 9th into a 11 chord and a 9th or an 11th into a 13th chord, but you dont have to. So an E13 could have -
An E(1st), a G#(3rd), a B(5th), a D(b7th), a F(9th), an A(11th), and a C(13th). But it only needs a 1, 3, 7 and 13 to be a '13' chord.Hope that helps.
:)

[ssiowi]

Yeah Andrew:

Mea culpa. That will teach me to post after 10:30pm--way past my bedtime.

Thanks and cheers,

D