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What do you call it?

What interval name do you use in practical application?

  • Base interval 2, 3, 4, 5, 6, 7

    Votes: 20 32.3%
  • Extension interval 9, 10, 11, 12, 13, 14, etc

    Votes: 42 67.7%

  • Total voters
    62
add9' instructs inclusion of a 7th

Various resources I have reviewed say they are not the same. C9 includes the 7th. C add9 is the triad with only the 9th added...no 7th. C9 is dominant, C add9 may or may not be dominant.

The doesn't necessarily mean when you see a C add9 that C9 was not intended, or that it will not be interpreted as C9, but there does seem to be intent to differentiate between the two.
 
As a bassist, I generally pay little attention to chord extensions past 7 - even the 7s are limited as usable as a bassline unless it's in passing. And a passing tone can be anything, so stuff above 7ths are simply passing tones. I'm not saying I never use tones outside of 1,3,5,7 - I can think of one song off the top of my head that I do feature the 9th - it's just unusual. I can't think of any instance where I use anything above that, at least not knowingly (ie passing tones might happen to be 11ths or 13ths).

But, I will admit to doing octave transpositions ("2 for 9", as OP suggests), to make it easier to identify which note that extension refers to when I want to know. 9ths come pretty easy, but when you get into 13ths and such, it's starts getting muddy - too much math on the fly.

IMO, use whatever method you need to understand what you're trying to do, so long as you can communicate with other musicians.
I think extensions are important to think about when constructing basslines because they can inform us what diatonic passing tones we can use: if there’s an F7b9 chord in a chart I’m going to try to avoid playing any G naturals (and stick to G flats or G sharps) because that clashes with the rest of the harmony. Chromatic passing tones in basslines are important (and do add lots of color), but it’s also important to be able to play “inside” the changes as well.
 
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I disagree - 2nd vs 9th has nothing to do with which octave it’s in (in the context of a chord, that is). A chord voiced C D E G is still Cadd9, even though it’s voiced as a cluster. And a chord voiced C G D could still be described as Csus2.

It’s just convention. Generally, if the chord has a 7th, then you’d use the 9/11/13 rather than 2/4/6. However, the first chord I described above is still usually called Cadd9 rather than Cadd2, so there are exceptions.
Hey, disagree all you want.
 
it actually has, the 13th instead of 6th means exactly this.

to be frank, I'm not educated in piano, but two first links in Google for 'G13 piano' gave me exactly the 13th voicing, not the 6th.

I've never seed '13' or '9' mean '6' or '2' in guitar chords for sure, it's always the next octave, just as notation suggests.

No, the use of 13 rather than 6 in the chord symbol has nothing to do with which octave you voice it in; the only difference is that 13 denotes the inclusion of the 7th (and optionally the 9th). You can put it at the top, or in the middle, or anywhere (other than as the bass note), and it's still a G13 chord. It doesn't matter what instrument you play it on either (it's not different for piano and guitar). Sure, if you google it you'll see it written with the notes in ascending order - that's the easiest way to conceptualise it. But there is no need to actually perform it that way.

The 9/11/13 thing, as far as chord symbols goes, doesn't imply which octave you play it in in any way at all. It's purely a convention regarding the inclusion of the 7th (and optionally 9th). If G13 is written, you include an F (and an A if you like), but if G6 is written you don't. Which octave you play the 13th (or indeed the 3rd, 5th, 7th and 9th in) is purely a matter of how you choose to voice the chord.

IMO, if you start to take the 13 to be an indication of where in the chord to voice that note, the logic falls apart somewhat. A 13th above what? The bass note might be played a couple of octaves lower. The actual note that's a literal 13th above the bass note might not even be in your voicing. In my right-hand piano example from the last post, the root wasn't even in the voicing. The G13 voicing could be E F A B, where the 7th, 9th and 3rd are all voiced above the 13th, but it's still G13.

Obviously when it comes to analysing intervals, yes 6th and 13th are an octave apart. What I'm talking about here just applies to chord symbols.
 
I believe, the only reason of this thread is that you still don't understand that it does.
I'm not sure, why you're so resistive understanding such a simple thing, but I give up.

that's how chord notation works, it's basics. even Google and Wikipedia know that.

good luck

Erm, I teach music theory. I have played jazz for many years. Believe me, I know about chord voicing. You're mistaken.
 
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Erm, I teach music theory. I have played jazz for many years. Believe me, I know about chord voicing. You're mistaken.

okay, let's step back:

In music theory, a ninth chord is a chord that encompasses the interval of a ninth when arranged in close position with the root in the bass. -- The New Grove Dictionary of Music and Musicians

this is ******** and you know music theory better?

okay, Merriam-Webster then:

ninth chord: a seventh chord with the ninth added : a chord that has an interval of a ninth from its lowest to highest note when in root position
 
Ok, but that is how chord symbols work, I didn't invent the system... C D E G is commonly called a Cadd9 chord. Whether you play the D a 2nd above your C or a 9th above is just a matter of how you choose to voice it. It's still called a Cadd9 chord.

you are correct that it is the same set of notes, but i tend to interpret chords in their "vanilla" non-inverted form from root to top. whether that is the best perspective though i can't say cause i am just a bass player, lol. and of course in execution a piano player is going to voice things in a cool way and not just hammer root position chords for a whole tune.
 
okay, let's step back:

In music theory, a ninth chord is a chord that encompasses the interval of a ninth when arranged in close position with the root in the bass. -- The New Grove Dictionary of Music and Musicians

this is ******** and you know music theory better?

okay, Merriam-Webster then:

ninth chord: a seventh chord with the ninth added : a chord that has an interval of a ninth from its lowest to highest note when in root position

These are very basic definitions that aid understanding for someone learning this. But it's still a 9th chord, regardless of where you put the 9th (assuming it's not the bass note).
 
okay, let's step back:

In music theory, a ninth chord is a chord that encompasses the interval of a ninth when arranged in close position with the root in the bass. -- The New Grove Dictionary of Music and Musicians

this is ******** and you know music theory better?

okay, Merriam-Webster then:

ninth chord: a seventh chord with the ninth added : a chord that has an interval of a ninth from its lowest to highest note when in root position

From The Jazz Theory Book by Mark Levine:

image.jpg
 
you are correct that it is the same set of notes, but i tend to interpret chords in their "vanilla" non-inverted form from root to top. whether that is the best perspective though i can't say cause i am just a bass player, lol. and of course in execution a piano player is going to voice things in a cool way and not just hammer root position chords for a whole tune.

Yep that's cool. As you say, in execution, that is not necessarily the case.
 
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one does write 'C9' and assume that's C7add9
Perhaps the difference is in European VS US interpretation.

In the US:

C7add9 is the same as C9...no need to write the 7 or add. Just write C9.

With this notation (C9) we assumes a dominant 7 chord stacked in 3rds. All intervals are part of the chord up to the highest interval indicated in the symbol. That does not mean you may not omit certain intervals.

Cadd9 has no 7th. Cadd9 is a C Major triad and only the specified interval is added CEGD.
 
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I don't see any contradictions. E3 is the same note as E2, it's E. but it's an octave above.

now re-read the definition regarding the 'ninth interval', know what that means?
show me the 13th interval in your G7add6. right, it's not there. so, it's not the G13.

I'm sorry, but in reality, that definition doesn't apply to the way chords are voiced. Ask any jazz musician. Mark Levine said in that paragraph that the 2nd is the same note as the 9th, etc.

Yes, from the point of view of learning chord theory, it is useful to imagine chords being based on stacking 3rds above the root note. It is a helpful way of thinking of it. But when it comes to actually playing them, it's not necessarily the case. G7add6 is not a chord symbol you're ever likely to see used. Any musician used to reading chord symbols would think it odd to see that written down. I've read many jazz and pop charts, and never once seen it written. G13, however, is commonplace.

I don't know how to say it any other way, the 9th/11th/13th can be voiced in any position (except as the root) and it doesn't change the chord symbol. This convention goes back decades, it's just the way it works! If you like, I can try and find some examples of voicings such as this written in music books with chord symbols written with them to demonstrate it.

Seriously, though, ask any jazz musician. That is how chord symbols work.
 
While yall debate octaves

I want to mention that the "even" extensions 10, 12, 14 I practically never encounter.

The only time was in the context of materials explaining major /minor double stops on a bass guitar,
with the root on the E string and the 10th (aka 3rd) on the G.

And 12th / 14th I have never seen in the wild.
 

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