#1
...what's the theory behind them? You just take any chord and add whatever interval the number is? What about 13ths and 15ths then?
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#2
Add chords are a base triad with an added note... another note added to your basic triad.


C - E - G = C.
C - E - G - D = Cadd9.


D being the 2nd (9th) of C major.

An add13 chord, would simply be called a 6th chord - as the 13th and 6th are the same note.


C - E - G - A = C6.
C - E - G - A = Cadd13?


You'd simply call that a C6.

With add15, lol... the 15th is the same tone as the tonic in a major chord.. ergo..


C - E - G - C = Cadd15?
C - E - G - C = C.


With add chords, some people tend to differentiate between chords with a 7th with added extensions and omitted notes and chords with a 7th with all the notes intact.

For example, some people might call...


C - E - G - B - D = Cmaj7add9


Where as, when the 7th is included the 'add' becomes redundant, leading to the chord being called.


C - E - G - B - D = Cmaj9


The Cmaj9 being the correct name, and Cmaj7add9 being incorrect - as once the 7th tone is present, 'add' becomes redundant.

Last edited by Johnljones7443 at Sep 16, 2006,
#3
Quote by Johnljones7443
With add15, lol... the 15th is the same tone as the 3rd in a major chord.. ergo..
The 15th would be an actave higher than the 7th, would it not?
#6
Quote by bangoodcharlote
You're welcome.


Hang on, wouldn't the 15th be two octaves higher than the tonic?


C - D - E - F - G - A - B - C - D - E - F - G - A - B - C...
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 -10 -11 -12 -13 -14 -15...


, I think that's right... I've had a few, so my impairments off.
Last edited by Johnljones7443 at Sep 16, 2006,
#8
D being the 2nd (9th) of C major.


Wait, why is the 2nd note a 9?
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#10
Quote by Ace88
Wait, why is the 2nd note a 9?


The 9th is the same note as the 2nd, but one octave higher in pitch.
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#11
Quote by Johnljones7443
For example, some people might call...


C - E - G - B - D = Cmaj7add9


And where might you have gotten that example?
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#12
Quote by Johnljones7443

C - E - G - B - D = Cmaj9


The Cmaj9 being the correct name, and Cmaj7add9 being incorrect - as once the 7th tone is present, 'add' becomes redundant.

So, C-E-G-B-F would be Cmaj13, or Cmaj6?

Also, what if the chord was C-E-G-D-F (ie, skipping the 7th and using the 9th and 13th)?
#13
Quote by Scourge441
So, C-E-G-B-F would be Cmaj13, or Cmaj6?

Also, what if the chord was C-E-G-D-F (ie, skipping the 7th and using the 9th and 13th)?


No, C (1) - E (3) - G (5) - B (7) - F (11) = Cmaj11. (Note though, that in most circumstances you won't see a maj11 chord because of the dissonance between the P4 and M3, so the F will get raised to an F# and the chord called Cmaj7#11)

Well, omitting the seventh and adding the 9th and 13th would... C(1) - E(3) - G(5) - A(6) - D(9) - A C6add9 chord, which is normally seen written as C6/9.

Looks like you got a bit mixed up with your notes aswell

#14
Quote by Johnljones7443
No, C (1) - E (3) - G (5) - B (7) - F (11) = Cmaj11. (Note though, that in most circumstances you won't see a maj11 chord because of the dissonance between the P4 and M3, so the F will get raised to an F# and the chord called Cmaj7#11)

Well, omitting the seventh and adding the 9th and 13th would... C(1) - E(3) - G(5) - A(6) - D(9) - A C6add9 chord, which is normally seen written as C6/9.

Looks like you got a bit mixed up with your notes aswell


My fault for forgetting basic math.
#15
What if the note you have isn't the 9th? For example what if you added that D to a C chord but it wasn't the one that's an octave higher?
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#16
That would be a Csus2. Given that, the D should somehow resolve downwards to the C.

Scourge441 - "Also, what if the chord was C-E-G-D-F (ie, skipping the 7th and using the 9th and 13th)?"

Answer: Em9b13. Although.... It would be unusual to build an Em9b13 on top of the altered b13, unless that C was a pedal tone. If it was a pedal tone, then it would most correctly be Em9/C.

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#17
That would be a Csus2. Given that, the D should somehow resolve downwards to the C.


If it was that case then it would be a Csus4 not Csus2. And i meant what if you don't change the C to a D (which is what constitutes a suspended chord) i mean what if you just throw it in there?
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#18
Csus4 would add an F, not a D. D is the second scale degree of C, so it would be a Csus2. A suspension typically resolves downward, so it would sound kind of funny if you didn't resolve the D down to a C.

If you don't change the C to a D, then you have CEG, which is a C chord.

Chris
Could I get some more talent in the monitors, please?

I know it sounds crazy, but try to learn to inhale your voice. www.thebelcantotechnique.com

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#19
Quote by Ace88
If it was that case then it would be a Csus4 not Csus2.


Where in the world do you get THAT from anyways?

Chris
Could I get some more talent in the monitors, please?

I know it sounds crazy, but try to learn to inhale your voice. www.thebelcantotechnique.com

Chris is the king of relating music things to other objects in real life.
#20
Wait yeah you're right my brain hiccupped and i misread that. My bad.
Quote by yellowfrizbee
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