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FretBuzz: Theory Forum Message |
Re: is my theory right?
5/14/2008 5:15:00 AM
Jeff Groves
(224) wrote:
Well, that's kind of an open-ended question. Both are correct depending on context. The short answer is that every interval has a reciprocal. Fourths invert to fifths. Thirds invert to sixths. Seconds invert to sevenths all it also works in reverse. Fifths invert to fourths. Sixths invert to thirds and sevenths invert to seconds.
I don't know if you know the different "states" of certain intervals, but seconds and thirds are major or minor. Fourths and fifths are perfect, diminished, or augmented. Sixths are major or minor. And sevenths are major, minor or diminished.
To add to what you asked to start with, minors invert to majors. Majors invert to minors. Perfect inverts to perfect. Diminished inverts to augmented. And augmented inverts to diminished.
Your D to G is a perfect fourth. Inverted: G to D is a perfect fifth. Let's add a B in there. D to B is a major 6th. Inverted: B to D is a minor 3rd. G to B is a major 3rd. Inverted: B to G is a minor 6th. You can try it. Works every time.
As usual, I've rambled, but I hope it helps and maybe makes you curious about some other possibilities.
Keep building mental chops
Jeff |
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Re: is my theory right?
5/14/2008 8:46:58 AM
Chris Bond II
(1808) wrote:
No.
What you are trying to do is classify a diad as a chord on it's own. Diads are commononly used as chords, implying other intervals which have been ommitted, or in the genre of rock and blues as "power chords"
What you display in true context when examining only notes played are simply 5ths and 4ths in unison.
Give them a function, in terms of a power chord then you commonly see it listed as a chord type.
This is indicative to guitar and sometimes piano based music.
For example you won't see a string ensemble playing power chord based music in a chamber etc.
So, in the end like most theory, there is a paradox and application determines more than anything point of veiw. |
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Re: is my theory right?
5/15/2008 6:00:56 AM
Derek Mccaughey
(654) wrote:
I'm using the diads as power chords within the rock genre.
I dont have a "big book of chords and diads for rock guitarists" only a limited knowledge of chord interval structure and a complete mental map of the note positions on each of the strings, this is how I found this (among others) open string diad.
I agree with your final point about the application determining point of view because when I'm playing the 3 string G5 diad in the following configuration E-3 A-5 D-5 if I try moving to the D-0 G-0 diad trying to use it as a D5 diad it doesnt work, it doesnt sound like the 5th interval I'm expecting to hear, it sounds more like the other G diad with a different flavour, but takes on the D5 identity when I move to it from other 2 and 3 string diads |
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Re: is my theory right?
5/19/2008 8:48:24 AM
Derek Mccaughey
(654) wrote:
To expand this idea further if I strum the open A, D, and G strings that cant be thought of anything other than an inverted Dsus4 chord/triad?
As for the strumming of the open D, G, and B strings, is this an inverted G major triad/chord?
And when I strum the open G, B, E strings, this is and inverted E Major chord triad right?
Do those chords have other names? |
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Re: is my theory right?
5/19/2008 11:07:31 AM
Jon Riley
(9692) wrote:
"To expand this idea further if I strum the open A, D, and G strings that cant be thought of anything other than an inverted Dsus4 chord/triad?"
It could be A7sus4, or even (just) a Gsus2. Sus chords are highly ambiguous as to root identity, but I think (as you say) D is the most likely aural root of an A-D-G chord.
"As for the strumming of the open D, G, and B strings, is this an inverted G major triad/chord?"
Yes. 2nd inversion, to be precise
And when I strum the open G, B, E strings, this is and inverted E Major chord triad right?"
No, E minor.
E major requires G#, not G. |
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