9th 11th 13th chords

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Chris99
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What is the theory behind the numbering of the notes, IE why is 9th not 2 etc...??

And can anyone give me any CHORD theory links
seljer
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well when you're building up chords you're continuously stacking thirds on top of each other
you've got the basic 1 3 5 to start with
add another third on that fifth and you get to the seventh
add a third from the seventh and you get to the 9th (an octave + a 2nd)

why 9 instead of 2? no idea. you still need to have the seventh and those other notes in there too, guess it makes more sense with the name

though I have seen add2 used instead of add9, which I assume would mean to use a voicing with the 2nd in the lower octave
Last edited by seljer on Thu Aug 16, 2007 8:14 am, edited 1 time in total.
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Big Bad Bill
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Isn't it because the stacked 9th is above the 2nd rather than in between the 1st and the 3rd? Like wise with the other extensions.
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RAI
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If you managed to play a chord that included the 2, it just wouldn't sound that good. Move the 2 up a full octave, and it doesn't sound as dissonant.
Roger
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RAI wrote:If you managed to play a chord that included the 2, it just wouldn't sound that good. Move the 2 up a full octave, and it doesn't sound as dissonant.
The dissonance is the whole beauty of an add9 chord. The 3rd and the 2 are right next to each other usually. Sounds good to me.
seljer
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Roger wrote:
RAI wrote:If you managed to play a chord that included the 2, it just wouldn't sound that good. Move the 2 up a full octave, and it doesn't sound as dissonant.
The dissonance is the whole beauty of an add9 chord. The 3rd and the 2 are right next to each other usually. Sounds good to me.
try any maj+9 chord if you want dissonance :twisted:
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lydian2000
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seljer wrote:
Roger wrote:
RAI wrote:If you managed to play a chord that included the 2, it just wouldn't sound that good. Move the 2 up a full octave, and it doesn't sound as dissonant.
The dissonance is the whole beauty of an add9 chord. The 3rd and the 2 are right next to each other usually. Sounds good to me.
try any maj+9 chord if you want dissonance :twisted:
:lol: took me a few seconds to get it.
spanishphrygian
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RAI wrote:If you managed to play a chord that included the 2, it just wouldn't sound that good. Move the 2 up a full octave, and it doesn't sound as dissonant.
Hey! A Sus2 chord sounds good: 1, 2, 5. or C, D, G. :oops:
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-SkiZ-
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maj add 9 with the 2nd in the same octave doesn't sound bad at all. i guess it depends on the instrument, in a distorted guitar it wouldn't sound so good...


i took this from wikipedia on extended chords

"Extended chords are tertian chords (built from thirds) or triads with notes extended, or added, beyond the seventh. Thus ninth, eleventh, and thirteenth chords are extended chords. After the thirteenth, any notes added in thirds duplicate notes elsewhere in the chord, so there are no fifteenth chords, seventeenth chords, and so on."
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burnt out
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Chris99 wrote:What is the theory behind the numbering of the notes, IE why is 9th not 2 etc...??

And can anyone give me any CHORD theory links
1 is the root note and 8 is the octave and if you keep counting past the octave then,

2 becomes 9
4 becomes 11,and then
6 becomes 13

Other than that you have to know your chord formulas

triads contain three notes:a root,a major or minor third, and a fifth

seventh chords contain a root,3rd,5th and 7th

there are different formulas for different triads and seventh chords

Triads:
maj = 1 3 5 (root,major third,perfect fifth)
min = 1 b3 5 (root,minor third,perfect fifth)
diminished = 1 b3 b5 (root,minor third,diminished fifth)
augmented = 1 3 #5 (rot,major third,augmented fifth)

Seventh Chords:
maj7 = 1 3 5 and 7
min7 = 1 b3 5 b7
"Dominant" seventh or "7" = 1 3 5 b7
Half Diminished seventh or "m7b5" = 1 b3 b5 b7
Diminished seventh = 1 b3 b5 bb7 (it has a double flat seventh)

and so on and so forth

sus chords would be either sus2 or sus4,

sus 2 = 1 2 5
sus4 = 1 4 5


A Dominant Seventh chord can also be a suspended chord,

7sus which means 7sus4 = 1 4 5 b7

etc-etc........

Someone posted some chord formulas here awhile back maybe if you search for them you'll be able to find them.Or try the internet.
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burnt out
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Big Bad Bill wrote:Isn't it because the stacked 9th is above the 2nd rather than in between the 1st and the 3rd? Like wise with the other extensions.
look at an add9 chord,

it's 1 3 5 9

you can take out the 5 and it's still an add9

but take out the third and then it's a sus2 (1 2 5)
Last edited by burnt out on Thu Aug 16, 2007 11:58 am, edited 1 time in total.
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-SkiZ-
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wikipedia has a lot of info on the "chords" article, and i recall it has nearly all chord formulas as well
Last edited by -SkiZ- on Thu Aug 16, 2007 11:56 am, edited 1 time in total.
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another virtuoso
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burnt out wrote:
Big Bad Bill wrote:Isn't it because the stacked 9th is above the 2nd rather than in between the 1st and the 3rd? Like wise with the other extensions.
look at an add9 chord,
it's 1 3 5 9
you can take out the 5 and it's still an add9
but take out the third and then it's a sus2
+1
Chris99
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Guys are there websites for all the chord shapes???

Anyways...

Maj 9

1 3 5 7 9

add 9

1 3 5 9
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another virtuoso
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guitar pro has a nifty feature in it that allows you to create a chord and then it gives you charts full of different ways to play it. it works the other way around too, you can create the chart for a chord and then it will give you all the names it could possibly be called. its a handy little tool.
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